Referred to as "flying fishes", Piranhas are yellow torpedo-shaped fish-like robots with large jet motors on their back, gray dorsal and pectoral fins, black eyes on the front, and a gray lower jaw below their eyes.
In Knuckles' Chaotix, Piranhas are only found in Marina Madness. They have a rather simple pattern of hovering back and forth in midair. Occasionally, when the player is standing below the Badnik, the Piranha stops and belches up a small mine that explodes after landing on the ground. It is possible to get hit by Piranhas in certain areas with hovering high-tech marinas.
After that, the Piranha hovers in one place for a couple of seconds before continuing its regular pattern, providing an opportunity for the player to Spin Jump into it. Like many of the enemies in the game, Piranhas are powered by synthesized Rings which they drop upon defeat.