Acanthurus gahhm

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Acanthurus gahhm
Black surgeonfish, Acanthurus gahhm at Abu Dabab Reefs, Red Sea, Egypt.jpeg
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Acanthuridae
Genus: Acanthurus
Species: A. gahhm
Binomial name
Acanthurus gahhm
(Forsskål, 1775)

Acanthurus gahhm is a species of fish in the family Acanthuridae, the surgeonfishes. Its common name is black surgeonfish.[1] It is endemic to the western Indian Ocean, where it occurs in the Red Sea, the Gulf of Aden and Socotra.[1]


This fish reaches up to 50 centimeters in length. It is oval in shape and laterally compressed. Like other surgeonfishes, it swims with its pectoral fins. The caudal fin has a crescent shape. The mouth is small and pointed. The body is black to dark brown, with a white ring around the base of the tail and a yellow stripe around the eyes. The pectoral fins are tipped with yellow.[2]


This is a demersal fish. It lives on reefs and in lagoons and other sandy areas up to 40 meters deep.[3]

This species is omnivorous, feeding on algae, zooplankton and other small invertebrates, and detritus. It is active during the day and may swim in groups or remain solitary.[4]


This species is kept in aquaria and harvested for food.[1]


  1. ^ a b c d Abesamis, R., et al. 2012. Acanthurus gahhm. The IUCN Red List of Threatened Species. Version 2014.3. Downloaded on 29 March 2015.
  2. ^ Allen, et al. Reef Fish Identification: Tropical Pacific. New World Publications, Inc., 2003. ISBN 1878348361
  3. ^ Froese, Rainer and Pauly, Daniel, eds. (2014). "Acanthurus gahhm" in FishBase. May 2014 version.
  4. ^ Vilcinskas, A. La vie sous-marine des tropiques. Vigot, 2002. ISBN 2711415252

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