Acanthurus blochii Valenciennes, 1835

Ringtail surgeonfish

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Perciformes \| Acanthuridae \| Acanthurinae
Synonyms	... more
Common names	Dark surgeon, Tailring surgeonfish, Blue-banded pualu, ... more

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Image of Acanthurus blochii (Ringtail surgeonfish)

Picture by Randall, J.E.

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This map was computer-generated and has not yet been reviewed.

AquaMaps Data sources: GBIF OBIS

Main reference

Randall, J.E. 1987. (Ref. 1921)
Other references | Biblio | Coordinator : Randall, John E. | Collaborators

Size / Weight / Age

Max length : 45.0 cm SL male/unsexed; (Ref. 48637)

Environment

Reef-associated; marine; depth range 1 - 12 m (Ref. 9710)

Climate / Range

Tropical; 30°N - 32°S

Indo-Pacific: East Africa, including the Mascarene Islands (Ref. 37792) to the Hawaiian and Society islands, north to Ryukyu Islands, south to Lord Howe Island.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 9; Dorsal soft rays (total): 25 - 27; Anal spines: 3; Anal soft rays: 24 - 25. Color in life bluish grey with numerous yellowish brown spots which tend to form irregular longitudinal lines; head with narrow irregular stripes; behind eye a yellow spot; brown pectoral fins; base of caudal fin with white bar. Caudal spine large, 3 - 4.4 in head. Stomach gizzard-like. Differs from A. dussumieri by having vertical stripes instead of spots on the blue central area of the caudal fin, from A. mata by having a lunate caudal fin, and from A. xanthopterus by having plain brown to blue-grey pectoral fins (Ref. 1602). The white ring around the base of the tail varies in intensity and may occasionally be absent (Ref. 1602).

Occurs in outer lagoon and seaward reefs, usually seen in small groups and school in some oceanic locations (Ref. 48637). Benthopelagic (Ref. 58302). Feeds primarily on the algal film covering compacted sand, ingesting the usual component of sand which probably aids in the trituration of the algal food in the thick-walled stomach, also feeds on diatoms and detritus (Ref. 3921).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless

Human uses
Fisheries: commercial; aquarium: commercial


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

Tools
Biogeographic modelling \| Bio-Quiz \| E-book \| Field guide \| Identification keys \| Length-frequency wizard \| Life-history tool \| Point map

Special reports
Check for Aquarium maintenance \| Check for Species Fact Sheets \| Check for Aquaculture Fact Sheets

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Summary page \| Point data \| Common names \| Photos

Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Low, minimum population doubling time 4.5 - 14 years (Tmax=35; K=0.25)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Moderate vulnerability (38 of 100)	Medium

Entered by Capuli, Estelita Emily

Modified by Ortañez, Auda Kareen

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