The Spot Tail Butterflyfish (Chaetodon ocellicaudus) is a small tropical fish species that is a member of the bright and colourful ‘Butterflyfishes’ fish family Chaetodontidae. This species can be found occurring in the warm tropical waters of the Western Central Pacific region and can be found from Malaysia to Papua New Guinea, north to the Philippines and across to Palau in Micronesia. This species looks very similar in appearance to Chaetodon melanotus however differs by the shape of the black mark on the caudal peduncle and it lacks a black mark on the chest, This species is known to occur in coral rich areas of reef flats and lagoons. Juveniles are generally solitary and found in inshore whilst adults are usually found in pairs. This fish is known to feed on soft coral polyps (such as Litophyton viridis and species in the genus Sarcophyton, Nephthia, and Clavularia). The Spot Tail Butterflyfish (Chaetodon ocellicaudus) is known to grow to a maximum length of approximately 15cm.