Acanthurus bariene, the bariene surgeonfish, black-spot surgeonfish, or eye-spot surgeonfish, is a species of marineray-finned fish belonging to the familyAcanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific.
Acanthurus bariene has 9 spines and between 26 and 28 soft rays supporting the dorsal fin while the anal fin is supported by 3 spines and 25 or 26 soft rays.[2] It has a deep body with its body being half its standard length and a convex dorsal profile to the head. The overall colour of the body is brown, gradually changing to yellowish-brown on the breast and belly, this is broken up by a large number of irregular horizontal greyish-blue lines. There is a black spot, similar in size to the eye, at upper end of gill opening, with a yellow bar running from the rear of the spot to under the pectoral fin. The dorsal fin is yellow with a thin blue line along its margin and base while the lobes of the lunate caudal fin are yellow.[6] This species has a maximum published total length of 50 cm (20 in).[2]
Acanthurus bariene is found in the Indian and Pacific Oceans from the Seychelles east to the Solomon Islands, south to Australia and north to the Ryukyu Islands.[1] It is typically found in the outer slopes of coral reefs at depths greater than 30 m (98 ft).[6]