Gringill

Gringills are large eel-like enemies in Super Mario Galaxy. They have large eyes and teeth, and can be orange or lavender in color. They first appear in the Beach Bowl Galaxy, and later appear in the Drip Drop Galaxy, Sea Slide Galaxy, Bigmouth Galaxy and Deep Dark Galaxy. They can be killed by throwing a Koopa Shell at them, while underwater. They attack simply by trying to eat Mario, similar to Bubba from Super Mario 64. They may be the Super Mario Galaxy equivalent of Unagi.