Acanthurus nigricauda

BéarlaColor in life dark brown without lines on body or spots on head (one phase is purplish grey); horizontal black band behind upper gill opening absent on juveniles <6 cm SL; elongate purple band may be present anterior to dorsal origin; caudal fin brown; outer third of pectoral fin pale. Species with gizzard-like stomach. Description: Characterized further by having white bar at base of caudal fin; length of caudal spine 2.8-4.5 in head length; greatest depth of body 2.0-2.2 in SL (Ref. 90102).

• Acanthurus nigricaudus Duncker & Mohr, 1929
• Acanthurus gahm nigricauda Duncker & Mohr, 1929