Devil Fish

The Devil Fish is an enemy that spawns in the 1st and 2nd layers of the Abyss.

It remains passive, swimming back and forth, until the player reaches under 1/4 of their max health, after which it will become aggressive and attempt to attack the player.

Its mask also protects it from 5 hits, after which it will break and the Devil Fish will become permanently aggressive. When the mask is broken, it receives a speed boost.

Trivia

 * The Devil Fish's masked state is tied with the Flak Crab's disguised state for having the highest defense of any enemy in the mod.