Learn how to obtain the Crimson Cavern Bestiary in Fisch with this detailed guide and add it to your collection.

The Crimson Cavern Bestiary in Fisch is a special underwater area where you can catch eight unique fish with red and crimson colors. To get there, you first need to unlock some secrets in the game, such as finding special keys and catching a giant blue dragon fish with a red mutation called the Crimson Colossal Blue Dragon.
Once you enter, you will find fish that appear only at certain times, in specific weather, and during certain seasons, and you need the right bait to catch them. Some fish are common, like the red-spotted blenny, while others are very rare or even legendary, like the vampire squid. Catching all these fish fills up your bestiary, which is like a fishing diary showing all the different fish you have caught.
The special fish and their unique conditions make the Crimson Cavern a fascinating place to explore and complete your fishing collection.
How To Get Into Crimson Cavern in Fisch

- Unlock the Luminescent Cavern:
- Collect three keystones found in the Desolate Deep area.
- Place the keystones on their matching pedestals at the Mysterious Crack.
- This opens the entrance to the Luminescent Cavern.
- Catch the Colossal Blue Dragon:
- Wait for the Colossal Blue Dragon to spawn near waterfalls in the Luminescent Cavern.
- It appears during clear weather in spring or summer and lasts about fifteen minutes.
- Use Shark Head bait, and try using sundial totems to trigger its spawn early.
- Get the Crimson Mutation:
- Take the Colossal Blue Dragon to the appraiser NPC in Moosewood.
- Pay to appraise it repeatedly until it gets the Crimson mutation.
- Submit the Crimson Colossal Blue Dragon:
- Go to the Crimson Guard NPC located near the Crimson Cavern door (coordinates: -1019, -336, -4332).
- Give the Crimson Colossal Blue Dragon to the NPC to unlock the door.
- Enter the Crimson Cavern:
- Swim through the opened tunnel (make sure to have diving gear or a water bubble to breathe underwater).
- Explore the Crimson Cavern and enjoy the new fish and rewards inside.
FAQs
What Is the Crimson Cavern?
The Crimson Cavern is a secret underwater area in Fisch where you can catch rare and special fish that you won’t find anywhere else.
Do I Need Any Special Gear To Explore the Crimson Cavern?
Yes. Since it’s underwater, it’s a good idea to have diving gear or a water bubble so you can breathe while you explore.
Is It Hard To Unlock the Crimson Cavern?
It does take some time and effort because you have to catch rare fish and collect special items, but it’s a fun challenge that’s worth it for the new fish and rewards.

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