Biter

The Biter Fish is an in-development life form that can be found around the Floater Islands, Grassy Plateaus, and the Jelly Shroom Caves.

However they can also be spawned in using the Debug Console Command "Spawn Biter".

Appearance
The Biter Fish is a small red and blue fish that strongly resembles a tadpole. It has two eyes on each side of its head, and a little mouth full of jagged yellow teeth. The Biter Fish has no pectoral fins, possessing only dorsal and tail fins. It also has a short Bioluminescent lure on its forehead, which is presumably used to draw in prey.