Family: Acanthuridae (Surgeonfishes, tangs, unicornfishes), subfamily: Acanthurinae
Order: Perciformes (perch-likes)
Class: Actinopterygii (ray-finned fishes)
FishBase name: Achilles tang
Max. size: 24.0 cm


Environment: reef-associated; marine; depth range 0 – 10m
Climate: tropical; 26 – 28°C; 28°N - 26°S
Importance: fisheries: commercial; aquarium: commercial; price category: medium; price reliability: very questionable: based on ex-vessel price for species in this family


Distribution:
Gazetteer Western Pacific: oceanic islands of Oceania to the Hawaiian and Pitcairn islands. Also known from Wake, Marcus, and Mariana islands. Eastern Central Pacific: southern tip of Baja California, Mexico (Ref. 9267) and other offshore islands.


Biology:
Occurs in clear seaward reefs, usually in groups. Engybenthic. Feeds on filamentous and small fleshy algae. Monogamous. Spine in caudal peduncle may be venomous. Size of metamorphosis from postlarva stage to juvenile is 6 cm. This species sometimes hybridizes with A. nigricans.


Info from www.fishbase.org