Orangespot surgeonfish (Acanthurus olivaceus) fish species and information / pictures of Orangespot surgeonfish - Acanthurus olivaceus

Orangespot surgeonfish (Acanthurus olivaceus) fish species information

Scientific Name
Acanthurus olivaceus

Common Name
Orangespot surgeonfish

Biology
Dorsal spines (total): 9; Dorsal soft rays (total): 23-25; Anal spines: 3; Anal soft rays: 22 - 24. Body of adult dark grayish brown; juveniles yellow; posterior to upper end of gill opening is a bright orange horizontal band, with purplish black border. Head and anterior half of body usually abruptly paler than the posterior half. Anterior gill rakers 24-28; posterior 23-27. Large adult males (about 17 cm) with more definite convexity of snout profile.

Classification

Classified By
Bloch & Schneider, 1801
Class
Ray-finned fishes (Actinopterygii)
Order
Perch-like fish (Perciformes)
Family
Surgeonfishes, tangs, unicornfishes (Acanthuridae)

Distribution

Region
Pacific Ocean
Distribution
Pacific Ocean: Christmas Island and Cocos-Keeling Islands in the eastern Indian Ocean to the Hawaiian and Tuamoto islands, north to Japan, south to Lord Howe Island. Replaced by Acanthurus tennenti in the Indian Ocean (Ref. 37816).
Range
35°N - 32°S, 95°E - 139°W

Environment

Climate
Tropical
Water Temperature From
24 °C
Water Temperature To
28 °C
Depth From - meters
3 m
Depth To - meters
46 m
Zone
reef-associated
Environment
Marine; reef-associated; depth range 3 - 46 m (Ref. 1602), usually 9 - 46 m (Ref. 1602)
Trophic Level
2.2 s.e. 0.17 Based on diet studies.
Occurs in Marine / Salt water
True
Occurs in Brackish water
False
Occurs in Fresh Water
False
Occurs on Reefs
True
Is kept in Aquariums
True

Physical Size and Genetics

Maximum Length
35.0 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; aquarium: commercial
Vulnerability
Low to moderate vulnerability (31 of 100)
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)
Threat To Humans
  Harmless (Ref. 4795)
IUCN Red List Status
  Not Evaluated