Yellow dotted butterfly fish

Scientific name : Chaetodon selene

Medium size butterfly fish (16 cm), uncommon, white with black eye band and posterior band, yellow fins, diagonal dotted lines.
Living normally on the external reef, usually along sandy or rubble slopes, deeper than 20 m.
Possible confusion with Chaetodon guentheri, that misses the back black band and has black-white edge of fins.