Acanthurus auranticavus Randall, 1956
Orange-socket surgeonfish
photo by Trevor, M.

Family:  Acanthuridae (Surgeonfishes, tangs, unicornfishes), subfamily: Acanthurinae
Max. size:  45 cm SL (male/unsexed); max. reported age: 30 years
Environment:  reef-associated; marine; depth range 1 - 20 m
Distribution:  Western Indian Ocean: Mozambique (Ref. 41878). Indo-West Pacific: Seychelles (Ref. 10685), Philippines, Indonesia and Great Barrier Reef; recently found in Maldives. Reported from Malaysia (Ref. 5756) and Samoa (Ref. 592).
Diagnosis:  Dorsal spines (total): 9-9; Dorsal soft rays (total): 25-26; Anal spines: 3-3; Anal soft rays: 23-24. Color in life dark brown; orange brown from pectoral base downward; caudal spine socket bright orange; orange blotch before and behind pupil; caudal fin base with a white band. Anterior gill rakers 20-23, posterior 24-28. Large caudal spine, 2.2 - 4.4 in head.
Biology:  Adults inhabit shallow reefs, both in lagoons and outer reef areas. They frequently move in groups. Juveniles found between soft corals in lagoons at depths of up to 2 m (Ref. 9710, 48637). Adults in groups, often mixed with other similar species (Ref. 48637).
IUCN Red List Status: Least Concern (LC); Date assessed: 03 May 2010 Ref. (123251)
Threat to humans:  harmless
Country info:   

Entered by: Capuli, Estelita Emily - 26.11.91
Modified by: Luna, Susan M. - 05.03.14
Checked by: Capuli, Estelita Emily - 25.08.94

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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