Fisch Desolate Deep Guide: Location, Brine Pool, Shops, and Puzzles

Hidden beneath the First Sea, Fisch Desolate Deep is a dangerous cave network packed with specialized equipment, valuable fishing spots, and late-game puzzles. Learning its layout matters because one wrong turn—or contact with a sea mine—can end your dive before you reach the merchants, Brine Pool, or Trident areas. This Fisch Desolate Deep guide explains how to enter safely, where each route leads, what to buy, and how to unlock its most important secrets.

How to Find and Enter Fisch Desolate Deep

The entrance to Desolate Deep is marked by a buoy north of Sunstone Island, behind the general area of Sunstone Island and the Statue of Sovereignty. Sail toward GPS -790, 125, -3100 and look for the buoy floating above the underwater entrance.

You can purchase Advanced Diving Gear at the buoy for 15,000C$. Buying it before descending is strongly recommended because the route involves a long underwater journey. Faster swimming equipment also makes later trips safer and less time-consuming.

For updated location notes, patch changes, and map details, consult the official Fisch Desolate Deep reference page.

After descending beneath the buoy, you will encounter two primary tunnels:

• Left tunnel: Leads to a smaller cave containing Roddy and a Merchant. Visit this side first if you need a Reinforced Rod, Flippers, Super Flippers, bait supplies, or Crab Cages.
• Right tunnel: Leads toward the much larger Desolate Pocket. The Mysterious Crack and its keystone pedestals can also be found along this route.

Active sea mines are the main environmental hazard. Touching one can kill your character instantly, so avoid swimming directly through dense clusters. Player experience suggests moving slowly, keeping the camera pulled back, and using smooth directional adjustments rather than repeatedly boosting forward.

Desolate Pocket Map, Shops, and Essential Purchases

The Desolate Pocket is the central hub of Fisch Desolate Deep. It is a broad cavern built around a tall rock pillar, with fishable water surrounding much of the accessible land.

Clarence, a Merchant, and an Inn Keeper are located in this area. Before exploring the most dangerous passages, interact with the Inn Keeper to establish a convenient return point. This is particularly important if you intend to trigger Detonator’s Rest by repeatedly dying to sea mines.

The Magic Mirror at -1625, -205, -2785 provides a free and fast exit. It returns you to Sunstone Island near its Merchant, making it more efficient than swimming back through the entrance tunnels.

Best items to buy

For a first visit, prioritize Advanced Diving Gear, a Glider, and a Conception Conch. The Glider is required for the standard Brine Pool routes, while the conch can rescue you if you become trapped or cannot safely return through the mines.

The Reinforced Rod is another strong progression purchase. It costs less than the Brine-Infused Rod and can be used in the Brine Pool, making it an economical bridge into the area’s specialized fishing content.

How to Reach the Brine Pool

The Brine Pool is one of the most important Fisch Desolate Deep sublocations, but it cannot be reached by simply following an underwater tunnel. You must climb and glide to a cave entrance at approximately -1725, -175, -3125.

There are two practical routes.

The path route is generally easier for a first attempt:

1. Leave the surrounding water at -1710, -235, -3075.
2. Follow the short upward path until it ends at a wall.
3. Deploy your Glider and curve around the rock on the left.
4. Land on the first platform.
5. Glide around the next rock formation to another platform.
6. Climb to the cave entrance at -1725, -175, -3125.
7. Follow the long tunnel until you arrive at the pool near -1795, -140, -3310.

Inside, look to the right for a high ledge with a skeleton wearing a hat. The Brine-Infused Rod, priced at 75,000C$, is sold there at approximately -1731, -100, -3345.

Brine fishing requirements

The green brine is not ordinary water. Your fishing rod must have at least 200 Durability, or it must carry the Invincible enchantment. A standard rod without either qualification cannot fish there effectively.

Small geysers around the walls are another hazard. When activated, they launch nearby players upward. That can be useful for movement, but an uncontrolled landing in the brine may kill you.

Brine Storms occur naturally and replace the standard catches with a separate storm pool. During these events, lure speed is reduced by 50%. Examples of storm catches include Dissolved Bone and Stormgazer, with Stormgazer favoring rain, daytime, winter, and Worm bait.

Trident Temple, Trident Vault, and Other Secrets

Progressing beyond ordinary fishing requires completing the 15-entry Desolate Deep bestiary. The separate Brine Pool section is not required to activate the main altar pedestals.

The altar cave is underwater at the southern end of Desolate Pocket, near -1470, -320, -2550. If your bestiary is incomplete, the pedestals will reject your interaction.

Opening Tridents Temple

Place an Enchant Relic on each of the five outer pedestals. Once all five are powered, the temple door opens for approximately one minute. If the timer expires, you will need another five relics to repeat the process.

The Trident Rod is sold at the end of the golden corridor. A player who enters through a door opened by someone else may still purchase the rod even without personally completing the bestiary.

Opening the Trident Vault

The Trident Vault uses a different sequence and leads to Poseidon’s Armory, where the Trident Striker is available.

Based on the current ritual description, the vault route requires nine Enchant Relics total, distributed as three relics per central pedestal. Do not open the Tridents Temple door immediately before attempting the vault ritual. An open temple door suppresses the vault sequence until it closes.

Detonator’s Rest

Detonator’s Rest is tied to deaths caused by sea mines in Desolate Pocket. You must die to them repeatedly—generally 25 times—to gain access to the isolated cave.

Set your location with the Inn Keeper before attempting this. Later mine deaths may send you back to the enclosed area, where ordinary exits are unavailable. Carry a Conception Conch or use the available Magic Mirror to escape. Detonator’s Rest is also where the Boom Ball can be purchased for 50,000C$.

Mysterious Crack

The Mysterious Crack is located in the right-hand tunnel and serves as the entrance to Luminescent Cavern. It contains three keystone pedestals:

There are nine possible keystones, but every player receives a permanent randomized combination of three. Inserted stones remain saved after leaving the server, so you do not have to complete the entire collection in one session.

Bestiary Rewards and Efficient Progression

The Fisch Desolate Deep bestiary contains 15 entries, while the Brine Pool has its own 10-entry bestiary. Completing these collections awards currency, bobbers, and badges.

The broader Desolate Pocket fishing pool contains 18 possible catches, including non-bestiary objects such as Logs and Rocks. The Brine Pool has 11 regular catches, while four additional catches can appear during Brine Storms. Not every catch in a location necessarily counts toward that location’s displayed bestiary total.

A productive progression order is:

1. Purchase Advanced Diving Gear at the entrance.
2. Explore the left tunnel and buy the Reinforced Rod if needed.
3. Enter Desolate Pocket and set a return point with the Inn Keeper.
4. Purchase a Glider and Conception Conch.
5. Complete the 15-fish Desolate Deep bestiary.
6. Gather at least five Enchant Relics for Tridents Temple.
7. Reach the Brine Pool and work on its separate collection.
8. Save nine additional relics if you plan to open the Trident Vault.
9. Attempt Detonator’s Rest only after preparing a reliable escape item.
10. Collect your randomized keystones for the Mysterious Crack.

Community reports and player experience consistently favor making several focused trips instead of trying to finish everything in one dive. Separating shopping, bestiary completion, and puzzle attempts reduces the currency and progress lost to avoidable mine deaths.

Fisch Desolate Deep FAQ

Where is Fisch Desolate Deep located?

The entrance buoy is north of Sunstone Island at approximately -790, 125, -3100. Descend beneath the buoy to reach the split between the Small Cave route and Desolate Pocket route.

What equipment should I bring to Desolate Deep?

Bring Advanced Diving Gear, swimming equipment, a Glider, and a Conception Conch. You will also need a rod with at least 200 Durability or the Invincible enchantment if you want to fish in the Brine Pool.

Do I need the Brine Pool bestiary to open Tridents Temple?

No. You need to complete the main Fisch Desolate Deep bestiary, which contains 15 entries. The 10-entry Brine Pool bestiary is a separate collection and is not part of the altar’s prerequisite.

How do I leave Desolate Pocket quickly?

Use the Magic Mirror at -1625, -205, -2785. It teleports you to Sunstone Island for free. A Conception Conch is another useful backup because it returns you to your established spawn location.