Scientist's Quest
Kraken's Quest
Mr. Black's Quest
Virelia's Quest
Diver's Quest
Suspicious Fisher's Quest
Grumpy Hank's Quest
Isolde's Quest
Isaac's Quest
Lumi's Quest
Morveth's Quest
Victor's Quest
Golem's Quest
Lost Captain's Quest
Crab's Quest
King Cat's Quest
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Abyss (Roblox)
Marcus Quest Chain Guide
Redeem your Abyss Codes (February 2026) here!
★ Progression Guide, How to Reroll Race, Tier List
★ Lists: Fish, Guns, Tubes, Races, Artifacts
★ Interactive Map: Ducks, Treasure Chests, NPC
★ Best Guns, Best Tubes, Best Artifact, Best Race
This is a guide for all of Marcus's quests in Abyss. Check out the walkthrough guides for Marcus's quests, as well as the rewards for all quests here!
List of Contents
Marcus's Quest Walkthrough
|
|
Equip the Radar
When progressing through Marcus's Quests, you will need to catch fish with specific mutations. Make sure to buy the Radar from Richard in the Forgotten Dome to easily identify fish and their mutations.
Marcus's Quest 1
| Catch Fish |
•
 Pompano
x6 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Find | • Sand Mutated Fish x1 | ||||||||||
| Best Tube | Best Weapon | ||||||||||
 Boat Tube
|
 Crossbow Gun
|
||||||||||
Upon arriving in Ancient Sands, it is recommended to save up until you get at least the Boat Tube and Crossbow Gun to comfortably farm within the area.
Marcus's Quest 2
| Catch Fish |
•
 Cod
x6 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Find and Open |
• Sand Mutated Fish x2 • Fish Bone x1 |
||||||||||
| Best Tube | Best Weapon | ||||||||||
|
Boat Tube
|
Crossbow Gun
|
||||||||||
Cod is fairly easy to catch as it is abundant and does not require much power. Make sure to pick up treasure chests that pop up during the fishing minigame to pick up Fish Bones.
Marcus's Quest 3
| Catch Fish |
•
 Blackfin Tuna
x3 •
Cod
x4 •
Pompano
x5 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Find and Open | • Cactus Mutated Fish x1 | ||||||||||
| Best Tube | Best Weapon | ||||||||||
|
Boat Tube
|
Crossbow Gun
|
||||||||||
The fish needed are all still relatively simple to catch, just make sure you have enough Oxygen to go further out into the area for longer.
Marcus's Quest 4
| Catch Fish |
•
Blackfin Tuna
x6 •
Pompano
x6 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Find and Open |
• Sand Mutated Fish x3 • Fish Bone x2 • Cactus Geode x3 |
||||||||||
| Special Item |  |
||||||||||
| Best Tube | Best Weapon | ||||||||||
|
Boat Tube
|
Crossbow Gun
|
||||||||||
Continue farming the local fish, and make sure to keep saving up money for gear upgrades.
Marcus's Quest 5
| Catch Fish |
•
 Grouper
x4 •
Blackfin Tuna
x5 •
Cod
x6 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Find and Open | • Fossil Mutated Fish x2 | ||||||||||
| Special Item |  |
||||||||||
| Best Tube | Best Weapon | ||||||||||
|
Boat Tube
|
Crossbow Gun
|
||||||||||
Grouper usually spawn further out within Ancient Sands, where Scorpionfish and Sharks may be lurking. Make sure to carry Oxygen Pods to refill your Oxygen when needed!
Marcus's Quest 6
| Catch Fish |
•
 Scorpionfish
x6 •
Grouper
x5 •
Blackfin Tuna
x6 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Find and Open |
• Cactus Mutated Fish x3 • Fossil Mutated Fish x2 • Fish Bone x6 • Cactus Geodes x5 |
||||||||||
| Best Tube | Best Weapon | ||||||||||
|
Boat Tube
|
 Wasted Gun
|
||||||||||
It is recommended to get the Wasted Gun from Crazy Jeff's Shop to comfortably farm Scorpionfish and other stronger fish within the area.
Marcus Quest Location
Found in Ancient Sands
 Overworld |
 Map Image |
Swim all the way west from the Forbidden Dome down to the Ancient Sands area to meet Marcus before the big rock arch. You will need at least the Pufferfish Tube and some Oxygen Tanks to get there.
Marcus Quests Overview
| Quest Giver | Location |
|---|---|
 Marcus
|
Ancient Sands |
| Repeatable? | |
| No | |
| Objectives | |
|
Marcus's Quest 1: • Catch 6 Pompano Fish • 1 Sand-Mutated Fish |
|
|
Marcus's Quest 2: • Catch 6 Cod • Catch 2 Sand-Mutated Fish • Bring 1 Fish Bone |
|
|
Marcus's Quest 3: • Catch 3 Blackfin Tuna • Catch 4 Cod • Catch 5 Pompano • Catch 1 Cactus-Mutated Fish |
|
|
Marcus's Quest 4: • Catch 6 Blackfin Tuna • Catch 6 Pompano • Catch 3 Sand-Mutated Fish • Bring 2 Fish Bone • Crack 3 Cactus Geode • Find 10 Tier 1 Treasure Chests |
|
|
Marcus's Quest 5: • Catch 4 Grouper • Catch 5 Blackfin Tuna • Catch 6 Cod • Catch 2 Fossil-Mutated • Find 2 Tier 2 Treasure Chests |
|
|
Marcus's Quest 6: • Catch 4 Scorpionfish • Catch 5 Grouper • Catch 6 Blackfin Tuna • Catch 3 Cactus-Mutated • Catch 2 Fossil-Mutated Fish • Bring 6 Fish Bone • Crack 5 Cactus Geode |
|
Marcus Quest Rewards
| Quests | Rewards |
|---|---|
| Marcus's Quest 1 | • $1000 • 5 Star Shards • Small Oxygen Pod x1 |
| Marcus's Quest 2 | • $1600 • 5 Star Shards • Small Oxygen Pod x2 |
| Marcus's Quest 3 | • $2450 • 10 Star Shards • Basic Oxygen Pod x1 • Cactus Geode x1 |
| Marcus's Quest 4 | • $3850 • 10 Star Shards • Basic Oxygen Pod x2 • Speed Potion x1 |
| Marcus's Quest 5 | • $4450 • 15 Star Shards • Small Oxygen Pod x4 • Drop Luck Potion x1 |
| Marcus's Quest 6 | • $7800 • 15 Star Shards • Basic Oxygen Pod x4 • XP Potion x1 • Cactus Geode x1 • Burger x1 |
This is the list of rewards you can obtain after completing each quest from Marcus.
Abyss Related Guides
All Quest Guides
Comment
Author
Marcus Quest Chain Guide
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