Dorsal spines: 9; Dorsal soft rays: 24-26; Anal spines: 3; Anal soft rays: 23-25.
A dark brown to blackish surgeonfish without fine longitudinal lines. Front of upper lip orange; rest of mouth and narrow zone around it white and a white band across the chest. It exhibits a large black spot above the axil of the pectoral fin and a pale band on the outer third of the pectoral fin. Dorsal and anal fins have a fine electric blue edge. Dorsal fin has an orange posterior portion on the distal part of the last 6 rays. Caudal fin in adults is deeply lunate with long lobes. It carries a peduncular spine with white sheath the socket rimmed in black. The caudal fin base is encircled by a white ring. There is an indistinct metallic blue band adjacent to the lunate terminal edge of the caudal fin. Juveniles are brown with a yellow caudal fin.
Maturity: Lm unknown. Range unknown. Max Length: 48cm SL
Habitat and Ecology:
Reef associated species occurring singly or in groups typically in outer reef areas between 3-40m depth. Grazer/detrivore feeding over sand on algae and detritus.
This species is not protected or subject to fishery regulations. It is caught in the fish trap fishery, but is a rare component of the catch.
Abesamis, R. et al (2012). Acanthurus leucocheilus. The IUCN Red List of Threatened Species 2012: e.T177994A1515329. http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T177994A1515329.en. Downloaded on 10 October 2018.
Bray D.J. : Acanthurus leucocheilus in Fishes of Australia
Froese, R. and D. Pauly. Eds. 2018. FishBase. World Wide Web electronic publication.
www.fishbase.org, https://www.fishbase.de/summary/Acanthurus-leucocheilus.html (10/10/18)
Randall, J.E. (2001). Surgeonfishes of Hawaii and the World. ISBN: 1-56647-561-9
Nevill, J.E.G. & Mason-Parker, C. (2019). Acanthurus leucocheilus, Ringtail surgeonfish. www.seatizens.sc.