Moorish idol

long white dorsal fin.

Scientific name	Zanclus cornutus
English name	Moorish idol
Japanese name	角出
Classification	Actinopterygii
Classification details	Perciformes Zanclidae
Full length	~25cm
Distribution	Tropical region from the Pacific Ocean to the Indian Ocean.

Characteristics

A saltwater fish characterized by a white dorsal fin that is 1.5 to 2 times longer than its body. The dorsal fin is curved inward. Black, white, and yellow alternate vertically. The root of the slightly elongated mouth like a beak is yellow. There is a triangular pale line running between the eyebrows.

Ecology

Found on reefs and coral reefs in tropical seas. Move alone or in small groups. It preys on algae and small animals on rocks.

Habitat

Hayakawa Beach, Kanagawa Prefecture

I photographed a medium-sized individual swimming alone during a dive. It wasn't very fast, it was a wandering way of swimming. The curved dorsal fin was graceful.