Parrot Fish, a brightly colored marine fish. It is named for its parrotlike beak, which is formed by the fusion of teeth in each jaw. The parrot fish uses its beak to scrape algae, its main food, from coral reefs. There are about 100 species of parrot fish, found in tropical and subtropical waters. They range in length from 18 to 48 inches (46 to 122 cm). The blue parrot fish is a common species in the Caribbean. It is royal blue with gray markings on the head.

Parrot fish belong to the family Scaridae. The blue parrot fish is Scarus coeruleus.