Acanthurus japonicus (Schmidt, 1931)
Japan surgeonfish
Acanthurus japonicus
photo by Randall, J.E.

Family:  Acanthuridae (Surgeonfishes, tangs, unicornfishes), subfamily: Acanthurinae
Max. size:  21 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 1 - 20 m
Distribution:  Indo-West Pacific: Sulawesi (Indonesia) to Philippines and Ryukyu Islands.
Diagnosis:  Dorsal spines (total): 9-9; Dorsal soft rays (total): 28-31; Anal soft rays: 26-29. A broad white band extending from lower edge of eye to upper lip. A bright orange band in outer part of soft portion of dorsal fin. Caudal peduncle yellow, shading to black a short distance anteriorly. Base of pectoral fins yellow (Ref 9808). Description: Characterized further by having caudal spine length 2.5-3.0 in head length; greatest depth of body 2.0-2.2 in SL (Ref. 90102).
Biology:  In clear lagoon and seaward reefs, usually in shallow exposed areas. Found in small to large aggregations (Ref. 48637). Sometimes solitary (Ref. 90102).
IUCN Red List Status: Least Concern (LC); Date assessed: 03 May 2010 Ref. (124695)
Threat to humans:  harmless
Country info:  BPBM 35223, 96 mm SL; Figure X (Ref. 26066).

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 Not for publication.

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