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Genshin Impact

Hydroculus Locations and Interactive Map

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Genshin Impact - Hydroculus Locations and Map

There are 271 Hydroculus in total found in Fontaine for Genshin Impact. They are collectible items used to level up the Statue of the Seven. See all Hydroculus locations with our interactive map and how to get them here!

Elemental Oculus Items
Genshin - All OculiAll Oculi Genshin - AnemoculusAnemoculus Genshin - Geoculus GuideGeoculus Genshin - Electrocolus GuideElectroculus
Genshin - DendroculusDendroculus Genshin - HydroculusHydroculus Gesnhin - PyroculusPyroculus Genshin - LunoculusLunoculus

Interactive Hydroculus Map and Locations

Hydroculus Locations Map

・Click on the arrow in the upper left corner to access our sidebar to check all other pins and even search for individual pins.
・Pins checked off the map will reflect in the list below.
We encourage users to sign up and log in to save your progress with the map.
Note: You can toggle the Area drop down menu to see other Fontaine map areas!
Hydroculus No.
Item Area How to Get
Hydroculus 1
Fontaine Surface
Location:
Located on top of a boat on the way from Sumeru to Fontaine. Use a Waverider to get there or use the Four-Leaf Sigil located at the bottom of the Hydroculus.
Hydroculus 2
Fontaine Surface
Location:
Located just ahead of the Romaritime Harbor Statue of Seven. Climb up near the pillars then just glide down to get the Hydroculus, or summon the Aquabus.
Hydroculus 3
Fontaine Surface
Location:
Located on top of the mountain by the Denouement of Sin artifact domain.
Hydroculus 4
Fontaine Surface
Location:
Located on a hill, the Hydroculus is on top of an artist easel with a blank canvas, facing the direction of the West Slope of Mont Automnequi.
Hydroculus 5
Fontaine Surface
Location:
Located on the side of the mountain, inside a hole dug into the ground surrounded by Meka enemies.
Hydroculus 6
Fontaine Surface
Location:
Located on top of an incredibly tall rock, north of the nearest surface teleport waypoint. There is a nearby tower with two Clockwork Meka enemies at the base of the rock.
Hydroculus 7
Fontaine Surface
Location:
Find 3 Seelies to summon a hydro ring. Ride it to the top of a platform that gives you a jumping boost and jump to the Hydroculus and a chest!
Hydroculus 8
Fontaine Surface
Location:
Located floating high above an arena east of the Beryl Region. Follow the Seelie to activate hydro rings at the top of a nearby cliff, use the rings to propel yourself towards the Hydroculus.
Hydroculus 9
Fontaine Surface
Location:
Located at the peak of a rocky mountain near the center of the Beryl Region.
Hydroculus 10
Fontaine Surface
Location:
Located at some ruins west of the Statue of the Seven in the Beryl region.
Hydroculus 11
Fontaine Surface
Location:
Defeat the Hydro Hilichurl Rogue on the cliff to gain access to this ship. Then, use the Pneuma Block to unlock both a Remarkable Chest and a path to the Hydroculus.
Hydroculus 12
Fontaine Surface
Location:
Located on top of a rib-like stone at the center of the Elynas, Beryl region.
Hydroculus 13
Fontaine Surface
Location:
Located on top of a rib-like stone pillar north of the Elynas waypoint.
Hydroculus 14
Fontaine Surface
Location:
Located north of the Elynas area, at the tip of another rib-like stone right beside a Hilichurl camp on the beach.
Hydroculus 15
Fontaine Surface
Location:
Located at the tip of a rib in the upper-center Elynas area of the Beryl Region. Glide down to this area from the nearby cliff-top teleport waypoint or climb the rocky outcrop to the Hydroculus.
Hydroculus 16
Fontaine Surface
Location:
Located on top of a small mountain east of the Statue of Seven in the Beryl Region.
Hydroculus 17
Fontaine Surface
Location:
Located on another boat southeast of the Statue of Seven in the Beryl Region.
Hydroculus 18
Fontaine Surface
Location:
Located on another boat south of the West Slopes of Mont Automnequi. Climb up the boat and jump to get the Hydroculus.
Hydroculus 19
Fontaine Surface
Location:
Located on an island south of the West Slopes of Mont Automnequi. The Hydroculus is guarded by an Anemo Hilichurl Rogue.
Hydroculus 20
Fontaine Surface
Location:
Located on top of a small rocky mountain north of the Emperor of Fire and Iron location. Climb up this mountain to get this Hydroculus.
Hydroculus 21
Fontaine Surface
Location:
Located floating in the air by the Aquabus path in West Slopes of Mont Automnequi. Use the Hydro Rings on top of the house to grab the Hydroculus.
Hydroculus 22
Fontaine Surface
Location:
You can either climb the rocky mountainside and use anemo on the pinwheel at the top to get to the Hydroculus, or you can find Antoine at the base of the mountain and use pneumosia to ride his flying balloon ship all the way to the Hydroculus.
Hydroculus 23
Fontaine Surface
Location:
Located inside the Aquabus tunnel in the West Slopes of Mont Automnequi.
Hydroculus 24
Fontaine Surface
Location:
Located at the tip of a spiral shipwreck structure in Poisson. Climb up to reach this Hydroculus.
Hydroculus 25
Fontaine Surface
Location:
Located on top of a tower guarded by Meka dogs. Find the nearby pneuma and ousia blocks to solve the puzzle, defeat all meka dogs to unlock the remarkable chest and use the resulting hydro ring to get to the top of the tower.
Hydroculus 26
Fontaine Surface
Location:
Located on top of a house right by the water, north of the West Slopes of Mont Automnequi.
Hydroculus 27
Fontaine Surface
Location:
Located in the middle of the three islands south of the Court of Fontaine, just above the water. Take a Waverider and exit just below the Hydroculus to be able to reach it.
Hydroculus 28
Fontaine Surface
Location:
Located on an island north of the Belleau Region, guarded by a Clockwork Meka.
Hydroculus 29
Fontaine Surface
Location:
Located floating above the water southeast of the Court of Fontaine. Find 3 Seelies underwater to activate the Echoing Conch, enter the hydro ring within the group of fish to launch yourself towards the Hydroculus.
Hydroculus 30
Fontaine Surface
Location:
Located on the roof of the train station entering Court of Fontaine. Get here by climbing or using the hydro ring at the base of the structure.
Hydroculus 31
Fontaine Surface
Location:
Located east of the Opera Epiclese, floating high above the water. To get it, successfully fish one time to summon a hydro ring and enter to launch yourself upwards.
Hydroculus 32
Fontaine Surface
Location:
Located under the bridge entering the Court of Fontaine by way of Aquabus.
Hydroculus 33
Fontaine Surface
Location:
Located on a small structure above the water, south of the Court of Fontaine. Use the hydro ring to grab the Hydroculus.
Hydroculus 34
Fontaine Surface
Location:
Located on top of the large green arch at the center of the Court of Fontaine. Climb the arch from the sides to get to the Hydroculus.
Hydroculus 35
Fontaine Surface
Location:
Located submerged in the shallow pond northeast of the Court of Fontaine, still within the city walls.
Hydroculus 36
Fontaine Surface
Location:
Located on the roof of a circular building north of the Court of Fontaine, attached to the outer wall.
Hydroculus 37
Fontaine Surface
Location:
Located on the top of the largest building in the Court of Fontaine.
Hydroculus 38
Fontaine Surface
Location:
Located northwest of the Court of Fontaine by the shoreline. Solve the Seelie puzzle to summon an updraft that can carry you towards the Hydroculus.
Hydroculus 39
Fontaine Surface
Location:
Located on top of a tower northwest of the Court of Fontaine. Find the highest point in the surrounding mountains then glide towards the tower.
Hydroculus 40
Fontaine Surface
Location:
Located on top of a silo in a settlement northwest of the Court of Fontaine.
Hydroculus 41
Fontaine Surface
Location:
Located on a lavender field northwest of the Court of Fontaine, near a teleport waypoint. Use the clover pinwheel in the field to launch yourself up to the floating Hydroculus.
Hydroculus 42
Fontaine Surface
Location:
Located at the top of a Hilichurl Base northwest of the Court of Fontaine.
Hydroculus 43
Fontaine Surface
Location:
Located at the end of the water canal north of the Court of Fontaine.
Hydroculus 44
Fontaine Surface
Location:
Located northeast of the Court of Fontaine. Dive underneath the Antoine Aircraft and borrow the nearby Aberrant Stingray's power to cut off the Yellow Fontemer Seagrass sticking to the craft. Simply ride the aircraft up using the pneumosia device until you reach the Hydroculus.
Hydroculus 45
Fontaine Surface
Location:
Located at the top of the mountains north of the Court of Fontaine.
Hydroculus 46
Fontaine Surface
Location:
Located on top of a tree at Marcotte Station, just south of the teleport waypoint. you can use the hydro ring to grab the Hydroculus on the way to the top of the cliff.
Hydroculus 47
Fontaine Surface
Location:
Located at the center of the fountain at Marcotte Station, on the way south of the Fountain of Lucine.
Hydroculus 48
Fontaine Surface
Location:
Located under the center of the bridge at the Opera Epiclese.
Hydroculus 49
Fontaine Surface
Location:
Located at the very top of the tall archway at the end of the Opera Epiclese overlooking the water.
Hydroculus 50
Fontaine Underwater B1 Hydroculus 50
Location:
Located inside the cave pathway leading down to the Emperor of Fire and Iron boss.
Hydroculus 51
Fontaine Underwater B1
Location:
Can be found under a rock pile in the cave of the Iron Viscount mini-boss! To unlock this area, you will need to solve the Boiling Water puzzle in the Beryl Region, Fontaine.
See related guide on how to get it!
Hydroculus 52
Fontaine Underwater B1
Location:
Can be found on the way to the cave of the Iron Viscount mini-boss! To unlock this area, you will need to solve the Boiling Water puzzle in the Beryl Region, Fontaine.
Hydroculus 53
Fontaine Surface
Location:
Located in the boiling water. To unlock this area, you will need to solve the Boiling Water Puzzle in the Beryl Region, Fontaine.
See related guide on how to get it!
Hydroculus 54
Fontaine Underwater B1
Location:
From the underwater teleport waypoint in Elton Trench, head straight down until you come across signs of shipwrecks, and follow it all the way to a cave. The Hydroculus will be on top of a shipwreck, surrounded by Treasure Hoarders.
Hydroculus 55
Fontaine Underwater B1
Location:
Located just between two cliffs near the Teleport Waypoint south of Elton Trench.
Hydroculus 56
Fontaine Underwater B1
Location:
Dive into the depths of the Elton Trench, down past shipwrecks and into the mouth of a cave where the Hydroculus is. This is on the way to Hydroculus #54.
Hydroculus 57
Fontaine Underwater B1
Location:
Located in an underwater room near the Elton Trench. Use the nearby pneuma block and attack the ousia posts to unlock.
See related guide on how to get it!
Hydroculus 58
Fontaine Underwater B1
Location:
On top of a giant, underwater lilypad with two Fontemer Aberrants circling it, on the northern side of the Elton Trench.
Hydroculus 59
Fontaine Underwater B1
Location:
Around north of the Elton Trench, behind a bounder you can destroy with a Crab Aberrant's ability.
Hydroculus 60
Fontaine Underwater B1
Location:
Located close to the surface north of the Elton Trench, right beside a pair of Bullet Barnacles.
Hydroculus 61
Fontaine Underwater B1
Location:
Found underwater in the cave leading to and from the south side of the underground Poisson village, in the Belleau region.
Hydroculus 62
Fontaine Underwater B1
Location:
Found on top of the giant ship on the north side of the underground Poisson village, in the Belleau region.
Hydroculus 63
Fontaine Underwater B1
Location:
The Hydroculus was guarded by the Fairy Knight twins, north of Salacia Plain.
Hydroculus 64
Fontaine Underwater B1
Location:
Can be found under the rock arch, in between the Elton Trench and Salacia Plain.
Hydroculus 65
Fontaine Underwater B1
Location:
In the small building ruin, you can find the Hydroculus, south of the Court of Fontaine in Salacia Plain.
Hydroculus 66
Fontaine Underwater B2
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Break the Bullet Barnacle to get the Hydroculus.
Hydroculus 67
Fontaine Underwater B2
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Found behind a door.
Hydroculus 68
Fontaine Underwater B2 Hydroculus 68
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Found at the top of some steps.
Hydroculus 69
Fontaine Underwater B1
Location:
Follow the path south of Salacia Plain into a cave and ride the current inside till you come across the Hydroculus under a small arc.
Hydroculus 70
Fontaine Underwater B2 Hydroculus 70
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Inside a small room guarded by rifthounds.
Hydroculus 71
Fontaine Underwater B1
Location:
Inside a locked, underwater room in the Salacia Plain, locked by Fantastic Floating Ball Mechanisms.
See related guide on how to get it!
Hydroculus 72
Fontaine Underwater B1
Location:
Located under a rock arch north of Salacia Plain.
Hydroculus 73
Fontaine Underwater B1
Location:
Located at the center of a big underwater plant north of Salacia Plain.
Hydroculus 74
Fontaine Underwater B1
Location:
Located near the bottom of the ocean floor, under an archway of an underwater ruin to the right of the Court of Fontaine.
Hydroculus 75
Fontaine Underwater B1
Location:
Find 3 Seelies to unlock the big bubble in the Thalatta Submarine Canyon, just by the teleport waypoint
Hydroculus 76
Fontaine Underwater B1
Location:
Located north of the Chemin de L'Espoir, behind a broken wall at the top of a ruin entrance.
Hydroculus 77
Fontaine Underwater B2
Location:
Pop the bubble and ride the Hydro ring up. Can be found in The Narzissenkreuz Adventure quest line.
Hydroculus 78
Fontaine Underwater B2
Location:
Can be found in The Narzissenkreuz Adventure quest line while solving a puzzle.
Hydroculus 79
Fontaine Underwater B2
Location:
Can be found in The Narzissenkreuz Adventure quest line, hit the device to summon steps that lead to the Hydroculus.
Hydroculus 80
Fontaine Underwater B1
Location:
Located northwest of the Elton Trench. Destroy the Bullet Barnacles around the area to reveal the Hydroculus.
Hydroculus 81
Fontaine Underwater B1
Location:
Located northwest of the Elton Trench, just by a teleport waypoint.
Hydroculus 82
Fontaine Underwater B2
Location:
Hidden under a stone in the waters of a lake north of the Statue of the Seven in the Elynas area.
See related guide on how to get it!
Hydroculus 83
Fontaine Underwater B1
Location:
In the area known as ''A Lonely Place,'' on top of a slanted structure, found in the A Brush of Seafoam and Crimson quest line.
Hydroculus 84
Fontaine Underwater B1
Location:
On top of a small rock pile in the Merusea Village, found in the A Brush of Seafoam and Crimson quest line.
Hydroculus 85
Fontaine Underwater B2
Location:
Northwest of ''A Very Bright Place'' on top of a pink house, found in the A Brush of Seafoam and Crimson quest line.
Hydroculus 86
Liffey Region Surface
Location:
Located south of the Liffey Region Statue of Seven. Climb the nearest high platform and glide towards the Hydroculus.
Hydroculus 87
Liffey Region Surface
Location:
Located just southwest of the Liffey Region Statue of the Seven high up the mountaintop.
Hydroculus 88
Liffey Region Surface
Location:
Located near the Statue of the Seven in the Liffey Region. Look southeast to see the Hydroculus on a broken pillar.
Hydroculus 89
Liffey Region Surface
Location:
Can be found floating above the river in Mont Esus East, near the Large Pneumousia Relay Station.
Hydroculus 90
Liffey Region Surface
Location:
Located on a buoy floating south of Mount Esus East.
Hydroculus 91
Liffey Region Surface
Location:
Located by the cliff north of Mont Esus East. Collect hydrogana and activate the hydro mechanism to make a temporary bridge to the Hydroculus.
Hydroculus 92
Liffey Region Surface
Location:
Can be found north of Mont Esus East, near the Large Dendro Slime.
Hydroculus 93
Liffey Region Surface
Location:
Continue north from #92 to find the Hydroculus floating above the box crates.
Hydroculus 94
Liffey Region Surface
Location:
Located far north of Mont Esus East, on top of the tower. Use the Hydro ring on the cliff to quickly reach the tower's peak.
Hydroculus 95
Liffey Region Surface
Location:
Located in the northernmost tip of the Liffey region, on the highest point of a small island inhabited by Hilichurls.
Hydroculus 96
Liffey Region Surface
Location:
Located north of the Millennial Pearl Seahorse, on top of the tallest pipe on a structure on the beach.
Hydroculus 97
Liffey Region Surface
Location:
Climb to the top of the tall golden tower north of the New Fontaine Research Institute to find the Hydroculus.
Hydroculus 98
Liffey Region Surface
Location:
Located on the map's northernmost edge, north of the New Fontaine Research Institute, and is guarded by a Frost Operative.
Hydroculus 99
Liffey Region Surface
Location:
Situated on the highest cliff to the north of the New Fontaine Research Institute.
Hydroculus 100
Liffey Region Surface
Location:
Located on the rocky mountain to the northwest of the New Fontaine Research Institute.
Hydroculus 101
Liffey Region Surface
Location:
Located at the center of the New Fontaine Research Institute area, on top of the tent roof.
Hydroculus 102
Liffey Region Surface
Location:
Located in the gap of the broken bridge leading out of the New Fontaine Research Institute.
Hydroculus 103
Liffey Region Surface
Location:
Break the Hydro Stone to summon a Hydro Ring, then ride it to the puzzle above.
Hydroculus 104
Liffey Region Surface
Location:
Located east of the Fontaine Research Institute by a stairway.
Hydroculus 105
Liffey Region Surface
Location:
Located beneath the ruins northeast of the New Fontaine Research Institute.
Hydroculus 106
Liffey Region Surface
Location:
Located at the very top of a tall tower to the north of the Central Laboratory Ruins.
Hydroculus 107
Liffey Region Surface
Location:
Located inside a locked ruin, northwest of Central Laboratory Ruins. Unlock the door by recharging the Terminal with a portable storage energy.
Hydroculus 108
Liffey Region Surface
Location:
Located slightly north of the Central Laboratory Ruins Teleport Waypoint, at the end of a ruined bridge.
Hydroculus 109
Liffey Region Surface
Location:
Located in a ruin in the Central Laboratory Ruins. Dive into the water and swim to it.
Hydroculus 110
Liffey Region Surface
Location:
Head to the center of the Central Laboratory Ruins, then climb the floating debris until you reach the uppermost piece, which contains the Hydroculus.
Hydroculus 111
Liffey Region Surface
Location:
Located at the end of a broken bridge, southeast of Central Laboratory Ruins.
Hydroculus 112
Liffey Region Surface
Location:
Can be found inside a hilichurl camp, south of the Teleport Waypoint, in the claw of a metal sculpture.
Hydroculus 113
Liffey Region Surface
Location:
Located immediately north of the Fontaine Research Institute Statue of the Seven at the end of a broken bridge.
Hydroculus 114
Liffey Region Surface
Location:
Located at the base of the broken bridge, south of the ruins of the Central Laboratory.
Hydroculus 115
Liffey Region Surface
Location:
Located just southwest of the Fontaine Research Institute, in between of a damaged pillar.
Hydroculus 116
Liffey Region Surface
Location:
Located west of the Fontaine Research Institute Statue of the Seven, at the very end of a broken bridge.
Hydroculus 117
Liffey Region Surface
Location:
Found on top of a tall pillar to the west of the Fontaine Research Institute Statue of the Seven. Glide over from the nearby Teleport Waypoint to obtain it.
Hydroculus 118
Liffey Region Surface
Location:
Located on a short bridge pillar southwest of the Fontaine Research Institute teleport waypoint.
Hydroculus 119
Liffey Region Surface
Location:
Located in the Fontaine Research Institute Region, behind a fallen pillar and west of a Teleport Waypoint.
Hydroculus 120
Liffey Region Surface
Location:
Located on a tiny mountain across the broken bridge from the Liffey Region Statue of the Seven. Simply climb the mountain to obtain it.
Hydroculus 121
Liffey Region Surface
Location:
Located on a mountaintop southwest of the Fontaine Research Institute Statue of the Seven. To get it, use the Teleport Waypoint nearby, then proceed southwest and climb the mountain.
Hydroculus 122
Liffey Region Surface
Location:
Located on top of the broken wall around the arena of the Experimental Field Generator.
Hydroculus 123
Liffey Region Surface
Location:
Located on top of a small tower to the south of the Experimental Field Generator. Simply glide off the nearby cliff to get it.
Hydroculus 124
Liffey Region Surface
Location:
Located near the southern Teleport Waypoint in the Fontaine Research Institute. Activate nearby Hydro mechanism and destroy the Jadewater Fruit to free two Seelie and remove the barrier.
Hydroculus 125
Liffey Region Surface
Location:
Located on a building's roof southwest of the Fontaine Research Institute Statue of the Seven. Simply glide from the bridge to obtain it.
Hydroculus 126
Liffey Region Surface
Location:
Located southeast of the Fontaine Research Institute Statue of the Seven on top of a ruin. Simply climb the ruin to obtain it.
Hydroculus 127
Liffey Region Surface
Location:
Located in a small ruin upstream, east of the Fontaine Research Institute Statue of Seven.
Hydroculus 128
Liffey Region Surface
Location:
Located on top of a small house in the southeast part of the Fontaine Research Institute area.
Hydroculus 129
Liffey Region Underwater B1
Location:
Located south of the Teleport Waypoint, hidden behind a boulder. To obtain it, use the Xenochromatic Jellyfish's ability to destroy the boulder at the bottom of the lake.
Hydroculus 130
Liffey Region Underwater B2
Location:
Can be found in the lake to the right of the Fontaine Research Institute's Statue of the Seven. Dive into the lake, pass through the tunnel, and continue down the road until you reach a big cavern. The Hydroculus can be seen in some ruins to the left.
Hydroculus 131
Liffey Region Underwater B1
Location:
Found in an underground cave east of the Experimental Field Generator. Collect all Mysterious Ores and Forge Press an Arkhium Lumenite in order to get access to Bravais' Secret Study.
See related guide on how to get it!
Hydroculus 132
Liffey Region Underwater B1
Location:
Can be found in an underwater ruin northeast of the Fontaine Research Institute Statue of the Seven. To open the ruin's gate, activate the Echoing Conch nearby and then use the Blubberbeast Ability.
Hydroculus 133
Liffey Region Underwater B1
Location:
Located slightly east of the underwater Teleport Waypoint, on top of a shattered pillar with an arch.
Hydroculus 134
Liffey Region Underwater B1
Location:
Located underwater amongst a shattered pillar, just west of the underwater Teleport Waypoint.
Hydroculus 135
Liffey Region Underwater B1
Location:
Located west of the Fontaine Research Institute Statue in a submerged tower. Swim to the bottom of the tower and destroy the Deepwater Assault Mek guarding the mechanism. Hit the mechanism once, then enter the tower to obtain the Hydroculus.
Hydroculus 136
Liffey Region Underwater B1
Location:
Located underwater, northeast of the Liffey Region Statue of the Seven, between three large coral platforms.
Hydroculus 137
Liffey Region Underwater B1
Location:
Located in Mont Esus East near the entrance to an underwater cave. Simply dive below and head to the cave entrance to find the Hydroculus.
Hydroculus 138
Liffey Region Underwater B2
Location:
Can be found deep below the underwater tunnel from #137. Simply swim deep into the tunnel and you should be able to see it on the far left side.
Hydroculus 139
Liffey Region Underwater B1
Location:
Located near the entrance of a metal shaft underwater, just below a large metal pipe structure.
Hydroculus 140
Liffey Region Underwater B1
Location:
Located immediately south of the underwater Teleport Waypoint, on top of one of the pipe metal structures.
Hydroculus 141
Liffey Region Underwater B1
Location:
Located on top of the Fortress of Meropide.
Hydroculus 142
Liffey Region Underwater B1
Location:
Located underwater north of Meropide's Fortress, at the entrance of the cave leading to the Millennial Pearl Seahorse.
Hydroculus 143
Liffey Region Underwater B1
Location:
Located north of the Fortress of Meropide, floating above seaweed and just past a cave entrance.
Hydroculus 144
Liffey Region Underwater B2
Location:
Can be found in a pool at the far end of the Millennial Pearl Seahorse boss arena from the Teleport Waypoint.
Hydroculus 145
Liffey Region Underwater B2
Location:
Obtainable after completing Unfinished Comedy sub-quest: An Eye for an Eye. After finishing the subquest, return to the map location and get the Hydroculus.
Hydroculus 146
Liffey Region Underwater B2
Location:
Follow the underwater tunnel from Hydroculus #144 until you get to the other end where a Hydroculus is floating above the water.
Hydroculus 147
Liffey Region Underwater B2
Location:
Find the trail heading north from the Teleport Waypoint near Hydroculus #146 and dive into the water. Open the gate with the Xenochromatic Jellyfish ability, then go inside and use the ability to hit the crystal from a distance to open the next gate. Continue along the trail until you reach the Hydroculus.
Hydroculus 148
Liffey Region Underwater B2
Location:
Can be found on top of a massive fan inside Kuisel's Clockwork Workshop. Just climb a nearby ladder and glide towards it.
Hydroculus 149
Liffey Region Underwater B2
Location:
Follow the path south from #146, dive underwater, and continue until you reach a metallic tunnel. A Hydroculus floats in the midst of a chamber, with a Clockwork Meka in the center.
Hydroculus 150
Liffey Region Underwater B2
Location:
To unlock the Terminal, defeat the Clockwork Meka and interact with it to open the gate. Continue south and descend to the lower east levels of the enormous room, where the Hydroculus is located.
Hydroculus 151
Erinnyes Forest
Location:
Just on a dead tree, past the rocky mountains north of the Marcotte Station.
Hydroculus 152
Erinnyes Forest
Location:
North of Marcotte station. You can glide from the short mountain south of the Hydroculus to get it.
Hydroculus 153
Erinnyes Forest
Location:
North of Loch Urania. To solve puzzle, head onto the water and investigate the seelie, which will lower the water level and give an exquisite chest. Use the Pneuma Orb in the shell nearby to destroy the Ousia mechanism.
Hydroculus 154
Erinnyes Forest
Location:
Climb on top of a small mountain north of Marcotte Station to get the Hydroculus, beside a Time Trial Challenge.
Hydroculus 155
Erinnyes Forest
Location:
Southwest of Loch Urania. Grab the Xenochromatic Octopus ability and push the jellyfish, which you can use to reach the Hydroculus.
Hydroculus 156
Erinnyes Forest
Location:
On top of the giant bubble in Loch Urania. You can access it after completing the Wild Fairy of Erinnyes quest.
Hydroculus 157
Erinnyes Forest
Location:
East of Loch Urania. Light up the three anemo monuments, and defeat the eye of the storm that will spawn. It will flee, creating a wind current. Fly up and get the hydroculus, and the eye of the storm can also be battled again.
Hydroculus 158
Erinnyes Underwater
Location:
On the north side underwater of weeping willow, destroy the red meanies to open up the path leading to the Hydroculus.
Hydroculus 159
Erinnyes Forest
Location:
North of Willow Tree Lake, inside tent beside a Local Legend enemy named Rocky.
Hydroculus 160
Erinnyes Forest
Location:
Found on top of some ruins to the right of the Weeping Willow of the Lake.
Hydroculus 161
Erinnyes Forest
Location:
Located east of the Weeping Willow of the Lake. Clear out the Bacteria Mats on the small pond. Then dive and follow the revealed path. The Hydroculus will be at the end, under a sewer grate.
Hydroculus 162
Erinnyes Underwater
Location:
Located east of the Weeping Willow of the Lake. Enter on the east side of the willow tree. You will see a cannon guarded by two Hilichurls. Use it to break the wall to reveal the Hydroculus.
Hydroculus 163
Erinnyes Forest
Location:
Placed on top of a small hill in the northeast part of Erinnyes Forest.
Hydroculus 164
Erinnyes Forest
Location:
Placed on top of a big rock east of Weeping Willow Lake, and treasure hunters can be found at the base of the rock.
Hydroculus 165
Erinnyes Forest
Location:
Located southeast of the Weeping Willow of the Lake, submerged in a small pool. Use the Xenochromatic Ball Octopus located east of this lake so you can dive underwater and get the Hydroculus.
Hydroculus 166
Erinnyes Forest
Location:
Located southeast of Weeping Willow Lake; release the three jellyfish from different pyro puzzles to receive the Hydroculus.
Hydroculus 167
Erinnyes Forest
Location:
Can be found in Weeping Willow of the Lake, between the tree roots.
Hydroculus 168
Erinnyes Underwater
Location:
Located inside an alcove found underneath an underwater path in Erinnyes. This path is accessible after cleansing the Root-Consuming Tumor during the Wild Fairy of Erinnyes quest.
Hydroculus 169
Erinnyes Forest
Location:
On top of rock cliff next to an Anemo Hilichurl Rogue.
Hydroculus 170
Erinnyes Forest
Location:
Contained inside a huge shell near the Statue of the Seven by Marcotte Station. To open the shell, hit it.
Hydroculus 171
Erinnyes Forest
Location:
The oculi lies near the Statue of Seven by Marcotte Station. You can use the Humongous Hat Jellyfish near to bounce to it, then glide, or climb the tree.
Hydroculus 172
Erinnyes Underwater
Location:
Located inside the submerged cavern in Erinnyes. This cavern is accessible during the final quest of the Wild Fairy of Erinnyes.
Hydroculus 173
Erinnyes Forest
Location:
Can be found south of the Weeping Willow of the Lake waypoint, on a rock overlooking the massive tree.
Hydroculus 174
Erinnyes Forest
Location:
Ride the aircraft near the Fountain of Lucine at the foot of the mountain. After reaching the top of the mountain, utilize the hat jellyfish that has spawned to reach the oculi.
Hydroculus 175
Erinnyes Underwater
Location:
Can be found beneath the tiny lake south of the Weeping Willow of the Lake waypoint; simply hit the shell to get the oculi inside.
Hydroculus 176
Erinnyes Forest
Location:
Located south of the Weeping Willow of the Lake. Complete the Time Challenge to reveal and access the Hydroculus.
Hydroculus 177
Erinnyes Forest
Location:
The oculi are locked up behind bars. Simple vault keys 1, 2, and 3 are required to open. Key 1is in the bird's nest on top of the shipwreck; Key 2 is from the Treasure Hoarders' Chest on the deck; Key 3 is under the spot on the south side of the shipwreck.
Hydroculus 178
Erinnyes Forest
Location:
Situated on top of a cliff north of Lumidouce Harbor.
Hydroculus 179
Erinnyes Underwater
Location:
Complete the puzzle/question at the rusty rudder to use the cannon and break the wall. Answers; 3 tables, 3 employees, Romaritime Flower
Hydroculus 180
Erinnyes Underwater
Location:
Can be found on a small pool of water underground.
Hydroculus 181
Erinnyes Forest
Location:
Can be found near the fork east of the Foggy Forest Path. Take the octopus ability from the machine and use it to get rid of the 3 bacterial mats. The hydroculus will then spawn, and both jellyfish will be freed and moved into position.
Hydroculus 182
Erinnyes Forest
Location:
Follow the foggy forest trail south of the waypoint from the fountain. The oculi is located beneath the bridge with a treasure hoarder and may be acquired simply by going across the bridge.
Hydroculus 183
Erinnyes Forest
Location:
Placed inside the Pneumousia Storage Box; break it using the ousia orb nearby.
Hydroculus 184
Erinnyes Forest
Location:
The oculi can be found near the waypoint south of the Fountain of Lucine's southeast exit. Use the machine to obtain the ball octopus ability, then use its powers to push the hat jellyfish you can jump on.
Hydroculus 185
Erinnyes Forest
Location:
Near the waverider waypoint on the foggy forest path. Use the machine to gain the ability of xenochromatic octopus, then push the jellyfish to jump and glide.
Hydroculus 186
Erinnyes Forest
Location:
Located southeast of the "Rusty Rudder" boat. Swim underwater and use the jellyfish to jump up.
Hydroculus 187
Erinnyes Forest
Location:
The oculi is located in Lumidouce Harbor. Obtain the octopus ability, hit the floating crystal flowers to make them spin, then use the platforms generated to approach the jellyfish.
Hydroculus 188
Erinnyes Forest
Location:
Placed on the left crane near the Lumidouce Harbor waypoint.
Hydroculus 189
Erinnyes Underwater
Location:
Found within a sunken ship north of the Fort Charybdis ruin waypoint.
Hydroculus 190
Erinnyes Forest
Location:
Located north of the Fort Charybdis Ruin. Take the two floating crystal and set them on the projector. Align the projector with the mirrors using the octopus ability.
Hydroculus 191
Erinnyes Underwater
Location:
Located in Fort Charybdis Ruins, floating above the golden gears. Climb one of the gears to your left. Reaching the top of the nearby shaft will summon a wind that will take you to the Hydroculus.
Hydroculus 192
Erinnyes Underwater
Location:
Similiar location to Hydroculus 191. Solve the Seelie puzzle to open up the underwater section of the area.
Hydroculus 193
Erinnyes Forest
Location:
Located in Fort Charybdis Ruins. Complete the Time Challenge located in the area to summon a hydro ring. This will take you to the Hydroculus above.
Hydroculus 194
Erinnyes Underwater
Location:
Located underwater just by the Morte Region Statue of the Seven. The Hydroculus is located inside the ruins where a Bubbler Seahorse resides.
Hydroculus 195
Erinnyes Forest
Location:
Located by the Morte Region Statue of the Seven, floating above the hole that leads to the ruins.
Hydroculus 196
Erinnyes Underwater
Location:
Can be found during the Search in the Algae Sea quest; in the same room as Hydroculus #197 but behind a large mechanism on the far side.
Hydroculus 197
Erinnyes Underwater
Location:
Can be found during the Search in the Algae Sea quest; follow the path on the right side of the underwater teleport waypoint.
Hydroculus 198
Erinnyes Underwater
Location:
Can be found during the Search in the Algae Sea quest. Locked behind a red barrier, but you can reach it through the doorway by the nearest teleport waypoint.
Hydroculus 199
Erinnyes Forest
Location:
Located northeast of the waypoint, north of Mount Automnequi's West Slopes. Simply utilize the jellyfish beneath it to obtain the oculi.
Hydroculus 200
Erinnyes Forest
Location:
Located near the waypoint, north of Mount Automnequi's West Slopes.
Hydroculus 201
Erinnyes Underwater
Location:
Found during the Cupid's Lover seal. Once inside the Orthant's chamber, go deep into the room where the piece is situated. There should be a looking glass inside. Use it to teleport within a corridor, carrying the Hydroculus and the special key.
Hydroculus 202
Erinnyes Underwater
Location:
Located at the entrance of the underground area in the East Slopes of Mont Automnequi.
Hydroculus 203
Erinnyes Underwater
Location:
Can be found underwater in ruins south of the Morte Region. You can simply swim up to it.
Hydroculus 204
Erinnyes Forest
Location:
Situated on top of a rock wall near the East Slopes of Mount Automnequi waypoint.
Hydroculus 205
Erinnyes Underwater
Location:
Located on an underwater arch north of the East Slopes of Mount Automnequi.
Hydroculus 206
Erinnyes Underwater
Location:
Located underwater, east of the East Slopes of Mont Automnequi teleport waypoint.
Hydroculus 207
Erinnyes Forest
Location:
Can be found on the huge tower in Morte Region. Enter the ring of water near the waypoint, which will take you almost to the top of the tower.
Hydroculus 208
Erinnyes Underwater
Location:
Can be found underwater to the north of the tower waypoint. Hydroculus can be obtained by destroying the massive rock.
Hydroculus 209
Erinnyes Underwater
Location:
Can be found just to the left of the surface waypoint of the Fort Charybdis Ruins.
Hydroculus 210
Erinnyes Forest
Location:
Can be found south of the Fort Charybdis Ruin. To obtain the oculi, use the Jellyfish situated on top of the shattered building.
Hydroculus 211
Erinnyes Underwater
Location:
Located by the west entrance of Fort Charybdis Ruins. The Hydroculus will be close by the shore.
Hydroculus 212
Erinnyes Underwater
Location:
Located underwater south of the west entrance of the Fort Charybdis Ruins. The Hydroculus is floating under a ruined underwater bridge.
Hydroculus 213
Erinnyes Underwater
Location:
Can be found beneath an underwater cliff southwest of the Fort Charybdis Ruins, near a seaweed clump.
Hydroculus 214
Erinnyes Underwater
Location:
Located floating above the east entrance of Fort Charybdis Ruins.
Hydroculus 215
Erinnyes Forest
Location:
Sits on a tiny mountain near a shipwreck southeast of Charybdis Waypoint.
Hydroculus 216
Erinnyes Forest
Location:
Located southeast of 215, near the map's boundary. Eliminate the hilichurls that are blocking the jellyfish, and then utilize it to fly up.
Hydroculus 217
Nostoi Region Surface
Location:
Can be found on top of a house near the Teleport Waypoint in Petrichor. Simply climb the house and get it.
Hydroculus 218
Nostoi Region Surface
Location:
Placed on top of the mountain in the village of Petrichor.
Hydroculus 219
Nostoi Region Surface
Location:
Teleport to Petrichor's central Waypoint and head east. The Hydroculus can be found on a pillar behind a tree.
Hydroculus 220
Nostoi Region Faded Castle
Location:
Found behind the bookshelf in the faded castle. To open the bookshelf, solve the Mysterious Grimoires puzzle by returning the Lost Grimoire.
Hydroculus 221
Nostoi Region Faded Castle
Location:
Located underwater and between two statues near the teleport waypoint. You can simply dive to retrieve it.
Hydroculus 222
Nostoi Region Faded Castle
Location:
Located on the left side of the stage of the Faded Castle. Near some musical instruments.
Hydroculus 223
Nostoi Region Faded Castle
Location:
Can be found on the Middle Level of the Faded Castle, near the library and past a Praetorian Golem. Hit the crystal and use the moving platform and hydro ring to reach the top. Use the Lost Grimoire to activate the bookcase, then open it using the Ancient Symphony.
Hydroculus 224
Nostoi Region Faded Castle
Location:
Found on a ledge in the southern portion of the Faded Castle, on the route to the Exhibition Hall, where the Statue of Marble and Brass is placed.
Hydroculus 225
Nostoi Region Faded Castle
Location:
Located at the far end of the arena in the Exhibition Hall of Faded Castle. Climb one of the nearby pillars and jump from there to grab the Hydroculus.
Hydroculus 226
Sea of Bygone Eras Caves B1
Location:
Found directly beneath the Teleport Waypoint, inside a tiny cavern in the Path of the Ocean Pillars.
Hydroculus 227
Sea of Bygone Eras Caves B2
Location:
Located on top of the first Nameless Stone Statue in the Caesareum Palace Cave. It should be at the tip of the blade.
Hydroculus 228
Sea of Bygone Eras Caves B2
Location:
Located on top of the blazing door in the center of the Caesareum Palace.
Hydroculus 229
Sea of Bygone Eras Caves B2
Location:
Hidden behind breakable rocks inside the Caesareum Palace.
Hydroculus 230
Sea of Bygone Eras Caves B2
Location:
Located at the entrance of the Caesareum Palace Cave, which lies near the sea floor, past a big, bright, pink coral with blue seaweed coming out of it.
Hydroculus 231
Sea of Bygone Eras Caves B2
Location:
Located south of Initium Iani, inside a crevice near the Recovery Orb fish.
Hydroculus 232
Sea of Bygone Eras Caves B1
Location:
Found on top of a broken golem statue in Porticus Anticus.
Hydroculus 233
Sea of Bygone Eras Caves B1
Location:
Found inside the big bell in Portus Anticus. Use the Aqua Current to easily get to the Hydroculus.
Hydroculus 234
Sea of Bygone Eras Caves B1
Location:
Located north of Initium Iani on the higher part of the stone tower.
Hydroculus 235
Sea of Bygone Eras Caves B2
Location:
Found on the lower level of Portus Anticus, on top of a Golem Statue near some blue corals.
Hydroculus 236
Sea of Bygone Eras Caves B1
Location:
Located on top of a cliff, with a line of floating rocks nearby.
Hydroculus 237
Sea of Bygone Eras
Location:
Located on top of the Stone Pillar west of the waypoint, surrounded by huge pink mushrooms.
Hydroculus 238
Sea of Bygone Eras
Location:
Located near the Teleport Waypoint in Initium Iani, beneath some blue corals.
Hydroculus 239
Sea of Bygone Eras
Location:
Found on top of a stone pillar in Initium Iani.
Hydroculus 240
Sea of Bygone Eras
Location:
Found underneath the giant yellow plant in Initium Iani.
Hydroculus 241
Sea of Bygone Eras
Location:
Found inside a square crevice with a blue green coral inside.
Hydroculus 242
Sea of Bygone Eras
Location:
Found at the top of the cliff south of Initium Iani. Located near the enormous blue seaweed.
Hydroculus 243
Sea of Bygone Eras
Location:
Located between two stone pillars in the Sea of Bygone Eras.
Hydroculus 244
Sea of Bygone Eras
Location:
Found on top of a giant pink mushroom in Sea of the Bygone Eras.
Hydroculus 245
Sea of Bygone Eras
Location:
Located north of Hortus Euergetis, behind a crevice behind a massive glowing flower.
Hydroculus 246
Sea of Bygone Eras
Location:
Located north of Alta Semita near the waypoint, on top of a small stone pillar.
Hydroculus 247
Sea of Bygone Eras
Location:
Found on top of a cliff near Alta Semita, next to a large plant.
Hydroculus 248
Sea of Bygone Eras
Location:
Found within a clam on top of a pink mushroom south of Alta Semita, near the waypoint.
Hydroculus 249
Sea of Bygone Eras
Location:
Located south-west of Clivus Capitolinus, near the broken bridge. You can find the Hydroculus on top of the huge orange mushrooms.
Hydroculus 250
Sea of Bygone Eras Caves B1
Location:
Can be found on top of blue corals surrounded by Fontemer Aberrants in Collegium Phonascorum.
Hydroculus 251
Sea of Bygone Eras Caves B1
Location:
Located between metal pillars inside the Collegium Phonascorum.
Hydroculus 252
Sea of Bygone Eras
Location:
Found in Collegium Phonascorum, surrounded by a force field and guarded by two Aurum Angelfish.
Hydroculus 253
Sea of Bygone Eras
Location:
Can be found on top of a broken pipe between Alta Semita and Collegium Phonascorum.
Hydroculus 254
Sea of Bygone Eras
Location:
Found within a damaged pipe in the center of Alta Semita.
Hydroculus 255
Sea of Bygone Eras
Location:
Found under a breakable rock pile at the very bottom of alta semita; smash the boulders using the nearby fontemer crab.
Hydroculus 256
Sea of Bygone Eras
Location:
Can be seen north of Alta Semita, on top of a stone pillar next to a large plant.
Hydroculus 257
Sea of Bygone Eras
Location:
Located behind a breakable rock. You can get the ability from the Aberrant nearby and use it to destroy the rock.
Hydroculus 258
Sea of Bygone Eras
Location:
Located north of Alta Semita on a small stone platform over the bridge.
Hydroculus 259
Sea of Bygone Eras
Location:
Found north of Alta Semita, between two Allochromatic Anemones under the bridge.
Hydroculus 260
Sea of Bygone Eras
Location:
Located north of Clivus Capitolinus, inside a large clam on a pink mushroom attached to the pillar.
Hydroculus 261
Sea of Bygone Eras
Location:
Can be found near the end of the bridge leading to the Clivus Capitolinus entrance.
Hydroculus 262
Sea of Bygone Eras
Location:
Found east of Alta Semita on top of a Washer Octopus, which is near three Allochromatic Anemones.
Hydroculus 263
Sea of Bygone Eras
Location:
Located east of Collegium Phonascorum, on top of a large blue plant.
Hydroculus 264
Sea of Bygone Eras
Location:
Located south of Clivus Capitolinus, atop the smaller stone pillar on the huge pink mushroom.
Hydroculus 265
Sea of Bygone Eras
Location:
Located south of Clivus Capitolinus, beside a treasure chest guarded by a Fontemer Crab.
Hydroculus 266
Sea of Bygone Eras
Location:
Located south of Clivus Capitolinus, between the broken pillars near the teleport waypoint.
Hydroculus 267
Sea of Bygone Eras
Location:
Located south-east of Clivus Capitolinus, inside a breakable rock. You can use the Aberrant Crab's abilities to destroy the rock.
Hydroculus 268
Sea of Bygone Eras Caves B1
Location:
Located on top of a tall, shattered pillar in the cave beneath the Clivus Capitolinus, in the same place as the Local Legend, Cineas.
Hydroculus 269
Sea of Bygone Eras
Location:
located inside the narrow opening on the top of the Clivus Capitolinus Building.
Hydroculus 270
Sea of Bygone Eras Caves B2
Location:
Use the elevator within the Domus Aurea after defeating the boss in the Fortune Plango Vulnera quest.
Hydroculus 271
Sea of Bygone Eras Caves B2
Location:
Located on the stairs inside the Doumus Aurea. To access the location, complete the final part of the Canticles of Harmony Quest Chain.

The Nostoi Region and Sea of Bygone Eras, have a total of 55 Hydroculi, bringing the overall total Hydroculus to 271!

Fontaine Map Guide

4.0 Surface Hydroculi Locations

4.0 Surface Hydroculi Locations

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Hydroculus #50 at the Emperor of Fire and Iron Boss

A Hydroculus is located inside the cave pathway leading down to the Emperor of Fire and Iron boss. You can find the entrance by toggling the layer map, and locating the orange mouth of a cave a little north to the boss icon.

Hydroculus #51 to #53 in the Boiling Water Puzzle

Item Area How to Get
Hydroculus 51
Fontaine Underwater B1
Location:
Can be found under a rock pile in the cave of the Iron Viscount mini-boss! To unlock this area, you will need to solve the Boiling Water puzzle in the Beryl Region, Fontaine.
See related guide on how to get it!
Hydroculus 52
Fontaine Underwater B1
Location:
Can be found on the way to the cave of the Iron Viscount mini-boss! To unlock this area, you will need to solve the Boiling Water puzzle in the Beryl Region, Fontaine.
Hydroculus 53
Fontaine Surface
Location:
Located in the boiling water. To unlock this area, you will need to solve the Boiling Water Puzzle in the Beryl Region, Fontaine.
See related guide on how to get it!

How to Clear Out the Boiling Waters

Underwater Hydroculus #54 to #65

Item Area How to Get
Hydroculus 54
Fontaine Underwater B1
Location:
From the underwater teleport waypoint in Elton Trench, head straight down until you come across signs of shipwrecks, and follow it all the way to a cave. The Hydroculus will be on top of a shipwreck, surrounded by Treasure Hoarders.
Hydroculus 55
Fontaine Underwater B1
Location:
Located just between two cliffs near the Teleport Waypoint south of Elton Trench.
Hydroculus 56
Fontaine Underwater B1
Location:
Dive into the depths of the Elton Trench, down past shipwrecks and into the mouth of a cave where the Hydroculus is. This is on the way to Hydroculus #54.
Hydroculus 57
Fontaine Underwater B1
Location:
Located in an underwater room near the Elton Trench. Use the nearby pneuma block and attack the ousia posts to unlock.
See related guide on how to get it!
Hydroculus 58
Fontaine Underwater B1
Location:
On top of a giant, underwater lilypad with two Fontemer Aberrants circling it, on the northern side of the Elton Trench.
Hydroculus 59
Fontaine Underwater B1
Location:
Around north of the Elton Trench, behind a bounder you can destroy with a Crab Aberrant's ability.
Hydroculus 60
Fontaine Underwater B1
Location:
Located close to the surface north of the Elton Trench, right beside a pair of Bullet Barnacles.
Hydroculus 61
Fontaine Underwater B1
Location:
Found underwater in the cave leading to and from the south side of the underground Poisson village, in the Belleau region.
Hydroculus 62
Fontaine Underwater B1
Location:
Found on top of the giant ship on the north side of the underground Poisson village, in the Belleau region.
Hydroculus 63
Fontaine Underwater B1
Location:
The Hydroculus was guarded by the Fairy Knight twins, north of Salacia Plain.
Hydroculus 64
Fontaine Underwater B1
Location:
Can be found under the rock arch, in between the Elton Trench and Salacia Plain.
Hydroculus 65
Fontaine Underwater B1
Location:
In the small building ruin, you can find the Hydroculus, south of the Court of Fontaine in Salacia Plain.

Hydroculus #66, #67, #68, and #70 found in the Aqueous Tidemarks Quest

Item Area How to Get
Hydroculus 66
Fontaine Underwater B2
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Break the Bullet Barnacle to get the Hydroculus.
Hydroculus 67
Fontaine Underwater B2
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Found behind a door.
Hydroculus 68
Fontaine Underwater B2 Hydroculus 68
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Found at the top of some steps.
Hydroculus 70
Fontaine Underwater B2 Hydroculus 70
Location:
Located in an underwater area locked behind an Ancient Key in the ''Aqueous Tidemarks'' world quest. Inside a small room guarded by rifthounds.

Four Hydroculi are located in an underwater area locked behind an Ancient Key, which can only be obtained through the ''Aqueous Tidemarks'' world quest!

Aqueous Tidemarks Quest Guide

Hydroculus #69 in a Cave in Salacia Plain

Follow the path south of Salacia Plain into a cave and ride the current inside till you come across the Hydroculus under a small arc. There will be rows of Bullet Barnacles along the way so watch out!

Hydroculus #71 Inside a Locked Underwater Room

How to Unlock the Room in Salacia Plain
1
Take a Crab Abberant's ability
2
Use the ability on the two nearby Fantastic Floating Ball and Rings.
3
Finally, interact with the two machines in front of the room to unlock it.

There is a Hydroculus inside a locked, underwater room in the Salacia Plain. Aside from the Hydroculus, this room will also contain a Treasure Chest!

Locked Underwater Dome Puzzle Guide

Underwater Hydroculus #72 to #76

Item Area How to Get
Hydroculus 72
Fontaine Underwater B1
Location:
Located under a rock arch north of Salacia Plain.
Hydroculus 73
Fontaine Underwater B1
Location:
Located at the center of a big underwater plant north of Salacia Plain.
Hydroculus 74
Fontaine Underwater B1
Location:
Located near the bottom of the ocean floor, under an archway of an underwater ruin to the right of the Court of Fontaine.
Hydroculus 75
Fontaine Underwater B1
Location:
Find 3 Seelies to unlock the big bubble in the Thalatta Submarine Canyon, just by the teleport waypoint
Hydroculus 76
Fontaine Underwater B1
Location:
Located north of the Chemin de L'Espoir, behind a broken wall at the top of a ruin entrance.

Hydroculus #77, #78, and #79 found in the Narzissenkreuz Adventure Quest

Item Area How to Get
Hydroculus 77
Fontaine Underwater B2
Location:
Pop the bubble and ride the Hydro ring up. Can be found in The Narzissenkreuz Adventure quest line.
Hydroculus 78
Fontaine Underwater B2
Location:
Can be found in The Narzissenkreuz Adventure quest line while solving a puzzle.
Hydroculus 79
Fontaine Underwater B2
Location:
Can be found in The Narzissenkreuz Adventure quest line, hit the device to summon steps that lead to the Hydroculus.

Three Hydroculi can be found in The Narzissenkreuz Adventure quest line. Check out our guide on this quest here:

The Narzissenkreuz Adventure Quest Guide

Underwater Hydroculus #80 to #82

Item Area How to Get
Hydroculus 80
Fontaine Underwater B1
Location:
Located northwest of the Elton Trench. Destroy the Bullet Barnacles around the area to reveal the Hydroculus.
Hydroculus 81
Fontaine Underwater B1
Location:
Located northwest of the Elton Trench, just by a teleport waypoint.
Hydroculus 82
Fontaine Underwater B2
Location:
Hidden under a stone in the waters of a lake north of the Statue of the Seven in the Elynas area.
See related guide on how to get it!

Hydroculus #83, #84, and #85 in A Brush of Seafoam and Crimson Quest

Item Area How to Get
Hydroculus 83
Fontaine Underwater B1
Location:
In the area known as ''A Lonely Place,'' on top of a slanted structure, found in the A Brush of Seafoam and Crimson quest line.
Hydroculus 84
Fontaine Underwater B1
Location:
On top of a small rock pile in the Merusea Village, found in the A Brush of Seafoam and Crimson quest line.
Hydroculus 85
Fontaine Underwater B2
Location:
Northwest of ''A Very Bright Place'' on top of a pink house, found in the A Brush of Seafoam and Crimson quest line.

Merusea Village has 3 Hydroculi, which can be unlocked through the Brush of Seafoam and Crimson quest line. Check out our guide on this quest here:

A Brush of Seafoam and Crimson Quest Guide

4.1 Surface Hydroculi Locations

4.1 Surface Hydroculi Locations

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Hydroculus #129 and #130

Item Area How to Get
Hydroculus 129
Liffey Region Underwater B1
Location:
Located south of the Teleport Waypoint, hidden behind a boulder. To obtain it, use the Xenochromatic Jellyfish's ability to destroy the boulder at the bottom of the lake.
Hydroculus 130
Liffey Region Underwater B2
Location:
Can be found in the lake to the right of the Fontaine Research Institute's Statue of the Seven. Dive into the lake, pass through the tunnel, and continue down the road until you reach a big cavern. The Hydroculus can be seen in some ruins to the left.

Hydroculus #131 Locked in Bravais' Secret Study

Found in an underground cave east of the Experimental Field Generator. Collect all Mysterious Ores and create Arkhium Lumenite in the Forging Press under Submerged Stony Path to get access to the cave.

Hydroculus #132 to #146

Item Area How to Get
Hydroculus 132
Liffey Region Underwater B1
Location:
Can be found in an underwater ruin northeast of the Fontaine Research Institute Statue of the Seven. To open the ruin's gate, activate the Echoing Conch nearby and then use the Blubberbeast Ability.
Hydroculus 133
Liffey Region Underwater B1
Location:
Located slightly east of the underwater Teleport Waypoint, on top of a shattered pillar with an arch.
Hydroculus 134
Liffey Region Underwater B1
Location:
Located underwater amongst a shattered pillar, just west of the underwater Teleport Waypoint.
Hydroculus 135
Liffey Region Underwater B1
Location:
Located west of the Fontaine Research Institute Statue in a submerged tower. Swim to the bottom of the tower and destroy the Deepwater Assault Mek guarding the mechanism. Hit the mechanism once, then enter the tower to obtain the Hydroculus.
Hydroculus 136
Liffey Region Underwater B1
Location:
Located underwater, northeast of the Liffey Region Statue of the Seven, between three large coral platforms.
Hydroculus 137
Liffey Region Underwater B1
Location:
Located in Mont Esus East near the entrance to an underwater cave. Simply dive below and head to the cave entrance to find the Hydroculus.
Hydroculus 138
Liffey Region Underwater B2
Location:
Can be found deep below the underwater tunnel from #137. Simply swim deep into the tunnel and you should be able to see it on the far left side.
Hydroculus 139
Liffey Region Underwater B1
Location:
Located near the entrance of a metal shaft underwater, just below a large metal pipe structure.
Hydroculus 140
Liffey Region Underwater B1
Location:
Located immediately south of the underwater Teleport Waypoint, on top of one of the pipe metal structures.
Hydroculus 141
Liffey Region Underwater B1
Location:
Located on top of the Fortress of Meropide.
Hydroculus 142
Liffey Region Underwater B1
Location:
Located underwater north of Meropide's Fortress, at the entrance of the cave leading to the Millennial Pearl Seahorse.
Hydroculus 143
Liffey Region Underwater B1
Location:
Located north of the Fortress of Meropide, floating above seaweed and just past a cave entrance.
Hydroculus 144
Liffey Region Underwater B2
Location:
Can be found in a pool at the far end of the Millennial Pearl Seahorse boss arena from the Teleport Waypoint.
Hydroculus 145
Liffey Region Underwater B2
Location:
Obtainable after completing Unfinished Comedy sub-quest: An Eye for an Eye. After finishing the subquest, return to the map location and get the Hydroculus.
Hydroculus 146
Liffey Region Underwater B2
Location:
Follow the underwater tunnel from Hydroculus #144 until you get to the other end where a Hydroculus is floating above the water.

Hydroculus #147 in the Submerged Stony Path

Find the trail heading north from the Teleport Waypoint near Hydroculus #146 and dive into the water. Open the gate with the Xenochromatic Jellyfish ability, then go inside and use the ability to hit the crystal from a distance to open the next gate. Continue along the trail until you reach the Hydroculus.

Hydroculus #148 and #150

Item Area How to Get
Hydroculus 148
Liffey Region Underwater B2
Location:
Can be found on top of a massive fan inside Kuisel's Clockwork Workshop. Just climb a nearby ladder and glide towards it.
Hydroculus 150
Liffey Region Underwater B2
Location:
To unlock the Terminal, defeat the Clockwork Meka and interact with it to open the gate. Continue south and descend to the lower east levels of the enormous room, where the Hydroculus is located.

4.2 Surface Hydroculi Locations

4.2 Surface Hydroculi Locations

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4.6 Surface Hydroculi Locations

4.6 Surface Hydroculi Locations

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Three of the surface Hydroculus in 4.6 are found around the Village of Petrichor, while the remaining six are found inside the Faded Castle. To gain access to the castle, travelers must play through the Canticles of Harmony quest.

The majority of the underwater hydroculus in 4.6 can be found within the Sea of Bygone Eras. Unlocking these areas require travelers to complete parts of the Canticles of Harmony quest in order to gain access.

How to Use Hydroculus

Upgrade Fontaine's Statue of the Seven

Genshin - Use Hydroculus on the Statue of the Seven in Fontaine
Like all other oculi, the Hydroculus is used to upgrade the Statue of the Seven in Fontaine! Upgrading the Statue of the Seven rewards you with Primogems, Shrine of Depths Keys, and Adventure EXP.

How to Level Up Statues of the Seven

How Many Hydroculus are There in 4.6?

There are 271 Hydroculus total found in the Fontaine region as of Version 4.6, meaning you can upgrade the Statue of the Seven in Fontaine up to its maximum level 10! You may also have 1 Hydroculus left over in your bag afterwards.

Search with Friends

If you're finding it hard to explore the various areas of Fontaine, bring a friend or two to help you! Check out our friend request and co-op boards for potential exploration buddies:

Genshin Co-Op Boards
Genshin - Friend Request BoardFriend Request Board Genshin - Co-Op BoardCo-Op Board Genshin - Supporting castBoardSupporting Cast Board

Rewards from Fontaine Statue of the Seven

Lvl. Hydroculus Required Rewards
2 20
Mora Mora x800
3 22
Mora Mora x1200
4 25
Mora Mora x1600
5 28
Mora Mora x2000
6 30
Mora Mora x2400
7 32
Mora Mora x2800
8 35
Mora Mora x3200
9 38
Mora Mora x3600
10 40
Mora Mora x4000

Note that players who have not reached Adventure Rank 60 can still gain Adventure EXP instead of Mora from the Statue of the Seven.

Tips on Finding Hydroculus

Use Resonance Stone Gadget to Detect Missing Hydroculus

Genshin - Hydroculus Resonance Stone Detection Range
Above shows the range of the Hydroculus Resonance Stone, which works similar to all the other Resonance Stones in the game.

Players can use the Hydroculus Resonance Stone to help collect Hydroculus! After crafting a Hydroculus Resonance Stone, go to your Inventory and select to use it. The map will then pull up and show you an approximate area where a Hydroculus is located.

Get from Fontaine Reputation System

You can get the crafting recipe for the Hydroculus Resonance Stone once you reach Reputation Level 8 in the Fontaine Reputation System.

Oculus Resonance Stone Guide

Genshin Impact Related Guides

Genshin Impact - Areas and Map Guides

All Interactive Map Guides

Map Guides for Teyvat Nations

List of Region Map Guides
Genshin - Mondstadt Map Guide SlimMondstadt Map Guide Genshin Impact - Liyue Map Guide SlimLiyue Map Guide
Genshin - Inazuma Map Guide SlimInazuma Map Guide Genshin Impact - Sumeru Region SlimSumeru Map Guide
Genshin Impact - Fontaine Region Slim Fontaine Map Guide Genshin - Natlan Region Map Guide Natlan Map Guide
Genshin Impact - Nod-KraiNod-Krai Map Guide

All Nations and Regions

Map Guides for Other Areas

List of Map Guides
Genshin Impact - Enkanomiya Map GuideEnkanomiya Genshin Impact - Archipelago Map GuideGolden Archipelago
Genshin Impact - Dragonspine Map GuideDragonspine Genshin Impact - The Chasm Map GuideThe Chasm
Genshin - Rainforest AreaSumeru Rainforest Genshin - Desert AreaSumeru Desert
Genshin Impact Veluriyam MirageVeluriyam Mirage Genshin Impact Chenyu ValeChenyu Vale
Genshin Impact Simulanka SlimSimulanka Genshin Impact - Sacred Mountain and Sanctified LandSacred City of Tollan
Genshin - Easybreeze Holiday ResortEasybreeze Holiday Resort

Oculi Location Guides

Teyvat Oculus Guides
Genshin - All OculiAll Oculi Genshin - AnemoculusAnemoculus Genshin - Geoculus GuideGeoculus Genshin - Electrocolus GuideElectroculus
Genshin - DendroculusDendroculus Genshin - HydroculusHydroculus Gesnhin - PyroculusPyroculus Genshin - LunoculusLunoculus

Other Oculus Map Guides

Dendroculus Guides
Rainforest Dendroculus All Desert Dendroculus
Hadramaveth Dendroculus Girdle of the Sands Dendroculus

Comment

33 Anonymous Anonymous 3 months

where is #168? i just finished the wild fairy in errinyes quest and whenever i go to the spot, its not to be seen in the cave, help!

32 jey jey 9 months

i have checked every.single.spot…twice. i’m still missing one. help i’m going insane

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