Gringills are enemies that appeared in Super Mario Galaxy and its sequel, Super Mario Galaxy 2. They are orange, large, eel-like enemies, and can be defeated by hitting them with a Koopa Shell. Their attack is trying to bite Mario or Luigi if they get too close. In Super Mario Galaxy, they can be found in Beach Bowl Galaxy, Drip Drop Galaxy, Sea Slide Galaxy Bigmouth Galaxy, and Deep Dark Galaxy.
In Super Mario Galaxy 2, Gringills have the same attack and weakness. They can be found in Cosmic Cove Galaxy, Slimy Spring Galaxy and Starshine Beach Galaxy.