Bloatfish

The Bloatfish is an enemy that spawns in lowest layer of the Abyss. While it is not aggressive and will not chase the player to attack them, it can still slightly hurt them via its low contact damage. It serves primarily as a meat-shield for other enemies, as it absorbs projectiles and gets larger as it takes damage, potentially reaching 3 times its original size.

Trivia

 * Although the Bloatfish is based on the ocean sunfish, which lives in the warmer and higher places of the water column, the Bloatfish only spawns at the very bottom of the Abyss.