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 will lose a life, regardless of his current health. 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 the main fish in Super Mario Sunshine. Their are three kind of Bubba in the game. One is pink and will grab Mario in its mouth; and drag him to the sea floor. Another is orange, and can jump extreme heights. Unlike the pink variety, orange ones may be defeated by being jumped on, or with FLUDD. The third is a brownish color that can only be found in Corona Mountain. They act just like the orange ones. Except the fact that they jump out of lava.