Naso thynnoides (Cuvier 1829)

Body elongate-ovate. Dorsal and anal profiles nearly even. Forehead without rostral prominence when in adults. Peduncular plate single, with a semicircular, retrorsely curved keel. Reaches 35 cm SL.Description: Characterized further by overall pale grey body color; side of body with broad yellowish zone and numerous thin bluish-grey bars; greatest depth of body 2.8-3.2 in SL (Ref. 90102).

Dorsal spines (total): 4; Dorsal soft rays (total): 28 - 30; Analspines: 2; Analsoft rays: 27 - 29

Generally uncommon species found in steep outer lagoon and seaward reef slopes (Ref. 9710, 48637). Maximum depth reported at 40m (Ref. 37792) Occurs singly or in large schools (Ref. 9710, 48637). Usually seen swimming steadily along upper edges of drop-offs in pursuit of plankton (Ref. 48637). A semi-pelagic fish that feeds on zooplankton, but remains over or near reefs. Also feeds on algae (Ref. 30573). It is cleaned by Labroides and sleeps on reefs at night, taking on a disruptive mottled pattern (Ref. 10671). Caught with nets (Ref. 30573).

fisheries: commercial; aquarium: commercial