The Brine Pool is home to special types of fish that you will need to complete the Desolate Deep bestiary in Roblox's Fisch.

The Brine Pool is one of the most deviously hidden areas ... Using at least basic diving gear - you'll die without it - swim directly down from the buoy into the circular cave mouth below and ...

To reach the Brine Pool in Roblox Fisch, you must first enter the Desolate Deep area. Then, purchase Diving Gear from near the Shipwright on Moosewood Island. This item will let you swim ...