Chaetodon auriga is up to 23 centimetres (9 in) long. Its body is white with `chevron' markings on the side. Tear edge of the dorsal fin has a prominent black spot, and a prominent black vertical band runs through the eye. The rear of soft-dorsal fin has a trailing filament, and it has a belly patch of descending oblique dark lines as well as bright yellow fins. Two subspecies are sometimes recognised: Chaetodon auriga auriga occurs in the Red Sea population and lacks the dorsal eyespot Chaetodon auriga setifer is the spotted population occurring outside the Red Sea. Learn more about Threadfin Butterflyfish