Deviation: Hydronaut Fish is a side quest in Once Human Way of Winter that lets you unlock the Hydronaut FIsh Deviant. Read on for a detailed walkthrough on Deviation: Hydronaut Fish, which also includes how to start the quest, its location, summary, and rewards.

How to Start Deviation: Hydronaut Fish

Talk to Lowe in Whalebone

To start this quest, you need to talk to Lowe in Whalebone in Vena Fjord. He will tell you that there is a Deviant in a nearby harbor.

Vena Fjord Region Guide

Deviation: Hydronaut Fish Location

Found in Vena Fjord

Deviation: Hydronaut Fish Location
Map Location	Overworld Location

You can start Deviation: Hydronaut Fish by going to the exact location indicated above in Vena Fjord and interacting with Lowe.

Deviation: Hydronaut Fish Walkthrough

Deviation: Hydronaut Fish
Talk to Lowe in Whalebone Talk to Hydronaut Fish Catch a Fish Craft a Fish Tank Secure Hydronaut Fish Return to Lowe

Talk to Lowe in Whalebone

Talk to Lowe in Whalebone in Vena Fjord. He will tell you that there is a Deviant in a nearby harbor that you need to secure, a sea creature named Hydronaut Fish.

How to Get Hydronaut Fish

Head to Petit Harbor and Talk to Hydronaut Fish

Follow the objective marker and you will see the the Hydronaut Fish standing near the dock. Talk to them and you will try to convince them to come with you.

Catch a Fish

At this point, your goal is simple: catch any fish in the harbor to proceed to your next objective. You need to have a Fishing Rod and a bait with you which you can craft in your territory.

How to Fish

Craft a Fishing Rod

To start fishing, you must first craft a Fishing Rod at a Supplies Workbench in your territory. This will cost 20 Logs and 10 Copper Bars to craft.

How to Craft a Fishing Rod

Grow Corn in Your Territory

Make a simple bait by using a corn to make a Dough Bait in the Supplies Workbench.

Unfortunately, in Way of Winter, you may have a difficulty finding a corn. To solve this issue, you will need to buy Corn Seeds from Silla and then plant them in Planter Boxes.

Note that this will take a lot of time to grow before you can harvest the corn.

How to Get Corn in Way of Winter

Craft a Fish Tank

Once you have the fish, you'll unlock the option to craft a Fish Tank. Return to your territory and build a fish tank and then place the fish that you caught within it.

Secure Hydronaut Fish

Return back to the harbor and talk to Hydronaut Fish. Your efforts of catching a fish so that they could have a companion will convince them of coming with you.

How to Get Hydronaut Fish

Return to Lowe

Return back to Lowe in Whalebone and talk to him to complete the quest.

Deviation: Hydronaut Fish Summary and Rewards

Once Human Related Guides

List of All Side Quests

All Side Quests

All Way of Winter Side Quests