This guide explains how to complete the Desolate Deep Bestiary in Fisch by collecting all 12 fish species.

Fisch is a popular fishing game on Roblox where you explore and collect rare fish and other sea creatures. There are over 400,000 variations of fish in the game, and you can log them in different bestiaries. The Desolate Deep bestiary is one of the most difficult ones to complete in the game. This guide explains how you can complete the Desolate Deep Bestiary in Fisch.
Fisch: How To Complete The Desolate Deep Bestiary
Here are all of the fish you have to collect to complete the Desolate Deep Bestiary in Fisch:
Fish Name | Rarity | Preferred Bait | Weather | Time | Season |
Stalactite | Trash | Magnet | Any | Any | Any |
Horseshoe Crab | Common | Any | Clear or Rainy | Any | Spring |
Slate Tuna | Common | Super Flakes | Clear or Rainy | Any | Spring |
Coral Geode | Uncommon | Magnet | Any | Any | Any |
Phantom Ray | Uncommon | Weird Algae | Any | Night | Summer or Autumn |
Cockatoo Squid | Unusual | Minnow | Any | Night | Summer or Winter |
Rockstar Hermit Crab | Unusual | Any | Foggy | Any | Summer |
Banditfish | Rare | Insect | Any | Any | Spring |
Barbed Shark | Legendary | Fish Head | Any | Any | Any |
Midnight Axolotl | Legendary | Insect | Any | Night | Spring or Autumn |
Emperor Jellyfish | Mythical | Magnet | Rainy | Any | Any |
Sea Mine | Mythical | Crab Cage | Clear | Any | Any |
Make sure that you use the appropriate bait to catch the fish. To make the experience easier, you can purchase a Bestiary Tracker from the entrance of Desolate Deep. It allows you to track your Bestiary progress anytime from the items menu.
Some fish spawn only at specific times. If you are looking for some of the rare fish, you can swap servers to find the right conditions. Here is how you can hop between servers:
- Press the Menu key on Fisch
- Click on Leave Game
- Click on the Play Button
- Repeat the process until you get the right weather or season to collect the fish you want
This process works only on public servers. If you play the game on a private server, you have to wait for the right season or weather to get your fish.
How To Unlock Desolate Deep
If you don’t have Desolate Deep unlocked, here’s what you have to do:
- Head to Sunstone Island
- Navigate to: -790, 125, -3100
- Use your diving gear to go underwater (purchasable at Moosewood Docks)
- Keep going down until you reach the chasm
- The right path takes you to the Desolate Pocket Area
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