The Pacific form of Chaetodon unimaculatus differs from the Indian Ocean form in that it has broader eye stripes which join on the chest, and its sides are much paler yellow in color.
Details
§ 01
size
Max. 20 cm
color
Bright yellow. Black eye stripe, dorsal spot (which may be round or shaped like an inverted teardrop) and striped along posterior margin across caudal peduncle. Tail pale.
This species is commonly found in outer reefs, reaching depths of up to 20 meters. It is usually observed in pairs and feeds on coral polyps, soft corals, sponges, polychaetes, and algae.
distinctive characters
This fish has a dorsal fin with 13 spines and 21-23 rays, an anal fin with 3 spines and 18-20 rays, and a pectoral fin with 14-15 rays. Its body depth is 1.4-1.6 times its standard length, and it has a robust snout and strong jaws.