Widespread West Pacific, ranging west to the Andaman Sea. Adults occur singly or in small groups and occasionally large schools are seen travelling oven open substrates. Juveniles are often found deep along reef walls in caves with rich invertebrate growth. Adults are identified by their more protruding snout and usually have a bright yellow pectoral fin. Small juveniles are black with a bright orange outline. This gives them the appearance of a nasty tasting flatworm. Length to 35cm.