The members of the family Chaetodontidae, popularly know as butterflyfishes, coralfishes and bannerfishes. Most species of butterflyfish live in the warm tropical seas of the Indo-Pacific (about 90%) with the remainder in the Atlantic. Only a few species are found in subtropical waters, bordering onto subtemperate zones. The butterflyfish have a highly compressed body in which the back is raised , forming an elongate-oval to near circular shape in some; a small protactible mouth with brush-like teeth in the jaws; a continuous dorsal fin with strong and sharp spines in the anterior section, followed by a large-surface soft part; an anal fin mirroring the soft part of the dorsal fin , headed by 3-5 strong spines, of which the 2nd is often greatly enlarged.
Place of origin:Melanesia
Widespread West Pacific, ranging to southern Japan and to sub-tropical Australian waters. Mainly found in sponge zones, and deep water occurrence in equatorial waters is habitat related, not in cold water as is sometimes suggested. A schooling species that is often on the move, with schools observed in various areas that are prone to strong currents. May be commonly seen in some areas for a while and then move on. Adults usually occur deep in equatorial waters, rarely found at depths of less than 40m. This species will travel in open water and cleans large pelagic fishes. Pearly white with numerous small dusky spots on sides, some forming vertical rows, and changing into yellow to orange from dorsal fin to anal fin, Sometimes has a black spot on upper end of dorsal fin. Length to 14cm.