Bubba

Bubbas are big fish with shades that will eat you if you get anywhere near him. They look and act a lot like Boss Bass from Super Mario Bros. 3. They appear in Tiny Huge Island in Super Mario 64. Bubba appears to be a species of Blurp. Related to them is the small Bub fish.

Additionally, stepping on a Happening Space on Yoshi's Tropical Island would make Bubba switch Toad's and Bowser's position. This is, of course, only in the original Mario Party.

Bubbas are in Super Mario Sunshine also. In this game, they drag Mario down to the seafloor. Also, if Mario is holding a Fruit, they can't grab ahold of him.