
The recent Mariana’s Veil update has significantly expanded the Fisch map, introducing five exciting new underwater locations and pushing the bestiary total beyond 30 entries. One standout addition is Challenger’s Deep, a breathtaking area filled with a wide variety of unique fish.
Challenger’s Deep is characterized by its frigid conditions, where ice formations abound. In addition to the native blue icy fish, anglers can also encounter a massive, elusive creature that is sure to leave you awestruck. This guide provides all the essential information you need to complete the Challenger’s Deep bestiary in Fisch.
Completing the Challenger’s Deep Bestiary in Fisch
The bestiary in Challenger’s Deep features nine distinct fish, each exhibiting its own unique icy patterns—markedly different from the aquatic life found in the first layer of Mariana’s Veil. Successfully capturing all species will complete your second-layer bestiary and reward you with a progression badge.
Location of Challenger’s Deep in Fisch

Accessing Challenger’s Deep requires initial travel to Volcanic Vents, where players must complete the submarine heat update quest. After this prerequisite, descending to Challenger’s Deep is a straightforward process. Players should navigate from the surface, going down until they see light-blue leaves and a large dark patch on the ocean floor (if Abyssal Zenith is not yet unlocked).Then, swim sideways toward the icy structures. For those starting from Volcanic Vents, dive north until you reach the ocean, then continue down until you see the blue leaves and walls, turning northwest thereafter.
Upon arriving at Challenger’s Deep, your warmth meter will gradually decrease. It is advisable to equip a Winter Cloak quickly, as you will need to traverse a considerable distance to reach the fishing zone where the bestiary-exclusive fish reside. Once you’re equipped, head northwest into the cave, following the path until you arrive at the Ice Fishing Pond.
All Fish in the Challenger’s Deep Bestiary

Challenger’s Deep Fish | Rarity | Season | Weather | Time | Bait |
Frostscale Fangtooth | Common | Winter | None | Day | Bagel |
Cryoskin | Common | None | None | None | None |
Chillshadow Chub | Uncommon | None | Clear | Day | Insect |
Subzero Stargazer | Uncommon | Winter | None | Day | Flakes |
Deep Freeze Devilfish | Unusual | Autumn | Rain | None | Squid |
Iceberg Isopod | Rare | Winter | Windy | Night | Minnow |
Cryo Coelacanth | Rare | Autumn | Clear | None | Shrimp |
Polar Prowler | Legendary | Winter | Clear | Night | Truffle Worm |
Chillfin Chimaera | Mythical | Winter | None | Night | Fish Head |
While completing the Challenger’s Deep bestiary involves capturing all nine designated fish, players should also look out for a hidden species known as the Frozen Leviathan. This extraordinary fish requires the creation of a special environment to be caught and is essential for solving the Giant Gate puzzle found in the fourth layer of Mariana’s Veil.
Strategies for Catching All Challenger’s Deep Bestiary Fish in Fisch

To enhance your chances of catching all fish in the Challenger’s Deep bestiary, consider the following tips:
- If a particular fish isn’t biting, utilize weather-based totems and ensure you’re fishing in the appropriate season. Since the method for catching a Cryoskin remains unconfirmed, it might be beneficial to experiment with Garbage Bait.
- Ensure you have a reliable fishing rod; capturing the bestiary-exclusive mythical fish requires dealing with a -50 Progress Speed, making a high-resilience rod crucial for success.
Leave a Reply