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Black surgeonfish (Acanthurus gahhm) fish species and information / pictures of Black surgeonfish - Acanthurus gahhm

Black surgeonfish (Acanthurus gahhm) fish species information

Scientific Name
Acanthurus gahhm

Common Name
Black surgeonfish

Biology
Dorsal spines (total): 9; Dorsal soft rays (total): 24-28; Anal spines: 3; Anal soft rays: 23 - 26. Characterized by having 2 longitudinal bands on the side, one from the hind margin of the eye posteriorly, another from the groove around the caudal peduncle spine anteriorly. Juveniles of less than 5 cm SL lack the anterior band; less than 10 cm SL lack the posterior band. Reaches 24 cm SL.

Classification

Classified By

Forssk?l, 1775

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Surgeonfishes, tangs, unicornfishes (Acanthuridae)

Distribution

Region

Western Indian Ocean

Distribution

Western Indian Ocean: endemic to the Red Sea and the Gulf of Aden.

Range

Unknown

Environment

Climate

Tropical

Water Temperature From

25 °C

Water Temperature To

27 °C

Depth From - meters

1 m

Depth To - meters

40 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 1 - 40 m (Ref. 27115), usually 5 - 40 m (Ref. 27115)

Trophic Level

2.76 s.e. 0.28 Based on food items.

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

40.0 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

Aquarium: commercial

Vulnerability

Low to moderate vulnerability (33 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Data deficient (DD)