Bandifish are a recurring enemy in Crash Bandicoot 3: Warped. They are found in the Prehistoric level Dino Might! flapping in the water. This fish has Crash's head, the rest of it is a fish tail and it can also spin like Crash does. If Crash gets hit by a Bandifish, the mutant fish will drag Crash under the water, and begin to feast on Crash.
They could possibly be an early evolution of Crash because they only appear in the prehistoric levels.
When encountering these enemies while performing the time trial, it's best to Double Jump and quickly execute the Death Tornado to avoid them, as waiting for the right timing to jump on them can waste time.