Piranhabon

Piranhabons are Piranha Plants covered in Goop found in Super Mario Sunshine. They resemble the head of Petey Piranha and roll along the environment, leaving behind a trail of Goop as they do so. They can and will run over Mario without stopping if he is in their path. If Mario sprays them with F.L.U.D.D, he can clean the Goop off of them, however, they will still leave behind Goop as they travel.

When jumped on, they will splatter on the ground leaving behind a puddle of Goop. It is best to simply avoid them.

Trivia

 * Their name possible comes from the chocolate dessert known as "bon bons". Since Piranhabons are round balls with brown sludge over them, they look like bon bons.