Bittacuda

The Bittacuda is an enemy in Super Paper Mario. It appears only in Chapter 3-2, in the Tile Pool. The Bittacuda is a carnivorous orange fish, slightly bigger than Bowser. It is one of the few enemies in the game that can attack even when Mario flips to 3D. The Bittacuda will swim toward Mario when it spots him, but it will eventually give up chase. While it can be beaten in either 3D or 2D, it is considered easier to beat it in its 3D form.

Despite their toughness and menacing look, Bittacudas seem to have a cowardly temper as they all fled in a comical manner when Big Blooper showed up.

Trivia

 * Its name is a portmanteau of "bit" and "barracuda", though they do not in any way resemble the fish from which they take their name.