Nibbles (also called Piranha) are Chomp-like fish that inhabit the waters of Rogueport and its surrounding regions in Paper Mario: The Thousand-Year Door. If Mario falls in any body of water, Nibbles will bite him, causing him to jump back to the same place he fell into the water. He will also lose one HP. These enemies cannot be battled. A few Nibbles can be seen in Sir Gordus's room in an aquarium that surrounds most of his room in the X-Naut Fortress. Nibbles are even found in swimming pools and fountains. One appears in the lower right-hand corner of the Magical Map.