Acanthurus tennentii (Günther, 1861)
Acanthurus tennentii (Günther, 1861)

Genus: ,

Scientific Name: Acanthurus tennentii (Günther, 1861)

English Name: Doubleband surgeonfish

Creole Name: Siriziyen koray

French Name: Chirurgien fer à cheval

IUCN Red List Status: Least Concern (LC)


Dorsal spines: 9; Dorsal soft rays: 23-24; Anal spines: 3; Anal soft rays: 22-23.

Brown to light tan body with black thick double band (horseshoe mark in smaller specimens) on shoulder behind operculum. A broad black zone on chin which can turn blue in breeding colours with a blue-green extension above the mouth. Caudal spine surrounded with black oval edged in electric blue/green. Caudal fin with bright white posterior edge and black submarginal line. Dorsal and anal fins with basal orange band, black submarginal band and electric blue outer edge. 


Maturity: Lm unknown. Range unknown. Max Length: 31cm TL; common length: 25.0 cm TL.

Habitat and Ecology:

Inhabits lagoon and seaward reefs, depth range 1-40 m, usually 3 - 25m. Solitary or in groups. Sometimes occurs in small shoals. Grazes on benthic algae.

Fishery Status:

This species is not protected or subject to fishery regulations. It is caught in the fish trap fishery. 


Froese, R. and D. Pauly. Eds. 2018. FishBase.  (14/10/18)

Nevill, J. (2013). A Species Identification Guide for Commonly Caught Fish in the Seychelles Near-Shore Artisanal Fishery. GOS/UNDP/GEF.

Randall, J.E. (2001). Surgeonfishes of Hawaii and the World. ISBN: 1-56647-561-9

Russell, B. et al 2012. Acanthurus tennentii. The IUCN Red List of Threatened Species 2012: e.T177997A1516035. (14/10/18).


Nevill, J.E.G. & Mason-Parker, C. (2019). Acanthurus tennentii, Doubleband surgeonfish. 

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