- “This is piranha water! Keep your smelly feet out!”
- —Piranha, Banjo-Kazooie
Piranha water is an environmental hazard appearing in Bubblegloop Swamp and its hub entrance in Banjo-Kazooie. It is a swamp, and involves piranhas biting Banjo for every few seconds he walks in it. When Banjo is first bitten, dialogue from a piranha appears on-screen, demanding him to keep his "smelly feet" out of the water.
Banjo and Kazooie cannot defeat the piranhas from the piranha water, but they can avoid them if Kazooie either uses the Wading Boots or her Wonderwing ability. Banjo can also avoid being bitten by the piranhas from using his Crocodile transformation.