Bubba

Bubbas are big pink or orange fish (usually wearing sunglasses) that will eat Mario if he gets too near them after a while. They look and act very similar to Boss Bass from Super Mario Bros. 3. Bubba appears to be a species of Blurp. Related to them is the small Bub fish.

Super Mario 64
Two Bubbas appear in Tiny-Huge Island and they cannot be defeated similar to most aquatic enemies in Super Mario 64. If Mario is eaten, he instantly loses a life, no matter how much HP he has. In Super Mario 64 DS, Big Berthas took the place of Bubbas.

Mario Party
Additionally, stepping on a Happening Space on Yoshi's Tropical Island, a gameboard in Mario Party, Bubba would eat Toad, switching Toad's and Bowser's position.

Mario Golf
In Mario Golf for the Nintendo 64, either a Bubba or Blurp will eat the ball if it lands in the water. They are also much smaller in this game.

Super Mario Sunshine
Bubbas are also in Super Mario Sunshine, but do not have sunglasses. In this game, they drag Mario down to the seabed. Strangely, if Mario is holding a Fruit, they can't grab onto him. They are much smaller, in fact they are about the size of Mario himself. They appear in Gelato Beach, Noki Bay, Delfino Airstrip, and The Bottle. Additionally, sub-species of Bubbas that inhabit lava called Lava Bubbas can be found in Corona Mountain.