The Raccoon Butterflyfish (Chaetodon lunula), also known as the crescent-masked butterflyfish, lunule butterflyfish, halfmoon butterflyfish, moon butterflyfish, raccoon butterfly, raccoon, raccoon coralfish, and redstriped butterflyfish, is a species of marine ray-finned, a butterflyfish belonging to the family Chaetodontidae. It is found in the Indian and Pacific Oceans.