Scientific Name
Acanthurus auranticavus

Common Name
Orange-socket surgeonfish

Biology
Dorsal spines (total): 9; Dorsal soft rays (total): 25-26; Anal spines: 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.

Classification

Classified By

Randall, 1956

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Surgeonfishes, tangs, unicornfishes (Acanthuridae)

Distribution

Region

Western Indian Ocean

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).

Range

20°N - 25°S, 35°E - 172°W

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

3 m

Depth To - meters

8 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 3 - 8 m (Ref. 48637)

Trophic Level

2 s.e. 0.00 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

45.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial

Vulnerability

Low to moderate vulnerability (26 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (tmax=30; K=0.67)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated