Minecraft Dungeons:Tropical Fish (mob)

A tropical fish is a passive mob that first appeared within the Minecraft Dungeons Cross-Platform Play Trailer where three of them are seen swimming in Dani's tank in her home, now a part of the Hidden Depths DLC that swim around in shoals.

Behavior
They are mostly seen swimming across missions in shoals, and they scatter away if a hero catches up to a shoal and attempts to attack it.