Fisch: How to Enter The Deep

The Deep sits at the far end of the ocean in Fisch, well past the point where normal sailing stops mattering. It hides some of the strangest fish in the game, but the entrance is easy to miss because it requires a specific route, the right diving equipment, and a single item handed over by an NPC. Get the sequence right and the descent is straightforward.

Quick answer: Equip a Flipper, Oxygen Tank, Tidebreaker, and Diving Gear, then sail north from Castaway Cliffs at (690, 135, -1693) until a black fadeaway screen crosses you to the far ocean. Travel to (228, 130, -11945), talk to Cadet Shimmerfin to receive the Deep Survive Device, then drop off the back of the ship near the anchor while holding the Tidebreaker.

Gear you must equip before the trip

Cadet Shimmerfin will not hand over the Deep Survive Device unless you are wearing every required item at once. Without that device, there is no way to proceed down the hole, so sort your loadout before you leave.

Item	Why it matters
Flipper	Increases your underwater speed
Oxygen Tank	Keeps your breathing time up while diving
Tidebreaker	Required to move fast enough and to descend into The Deep
Diving Gear	Standard requirement for surviving underwater

Tip: The Tidebreaker does double duty here. You need it equipped to satisfy Shimmerfin, and you keep holding it during the drop to keep moving toward the depths below.

Cross the ocean from Castaway Cliffs

Travel to the Castaway Cliffs at GPS (690, 135, -1693). This is your launch point, so make sure your boat is with you before setting a course.

Sail in a Northern direction into the open ocean and keep going. You are heading for a small barrier that marks the edge of the normal map.

Watch for a short black fadeaway screen. That brief transition is the game teleporting you across the barrier, and once it clears you will be on the far side of the ocean.

Get the Deep Survive Device from Cadet Shimmerfin

From the far side, head straight to (228, 130, -11945). You are looking for a ship with the words “The Deep” displayed above it.

Board the ship and interact with the Cadet Shimmerfin NPC while wearing your Flipper, Oxygen Tank, Tidebreaker, and Diving Gear. He explains the uncharted territory below and hands over the Deep Survive Device, which he recovered while exploring the area and which belongs to the people of the floor.

If Shimmerfin refuses to give you the device, the only reason is missing gear. Re-check that all four items are equipped, not just carried, and speak to him again.

Drop into The Deep and find the town

Once you finish talking to Shimmerfin, move to the anchor area at the back of the ship. This is the spot where you begin the descent.

Jump straight down toward the ground while holding the Tidebreaker. Keep holding it so you continue moving toward the depths instead of stalling out on the way down.

Within a few seconds a town with large white domes and palaces comes into view. Enter the central part of the town to refill your oxygen, and from there you can begin fishing and exploring The Deep.

How to know you made it

You have reached The Deep once the white-domed town appears at the bottom of your drop. Head into its center to top off your oxygen before your air runs low, then treat that hub as your base for the area. If you never see the town, the usual causes are dropping without the Tidebreaker in hand or never receiving the Deep Survive Device because a piece of gear was unequipped when you spoke to Shimmerfin.