Sunday 19 May
Sohal surgeonfish (Acanthurus sohal)
What’s the World’s Favourite Species?Find out here.
Sohal surgeonfish fact file
- Find out more
- Print factsheet
Sohal surgeonfish description
A beautiful fish of tropical reefs in the Indian Ocean, the sohal surgeonfish (Acanthurus sohal) is vividly coloured with striking blue and white stripes stretching along the body and jet black fins with yellow margins (3). This attractive fish is dark blue on the upperside, fading to silver on the sides, and whitish on the underside (4) (5). There are narrow blackish stripes on the head above the eyes, faint grey lines below the head and chest, and patches of orange beneath the pectoral fins and around the razor-sharp, long, slender tail spine (4) (5) (6). This spine normally sits flattened in a groove, but when the fish is disturbed or threatened this formidable weapon is rapidly erected and can be used to inflict slashing wounds on other fish (6). The distinctive sohal surgeonfish also has a deep, elongated, flattened body, with the eyes positioned high on the head, and a well-defined, concave tail fin with long, elaborate lobes, which are black with a vibrant blue edge and a large diffuse brown area in the centre (2) (4) (5). The mouth is small, but armed with an impressive array of small, sharp teeth which are used to rasp algae on rocks (2) (6).
- Also known as
- Arabian surgeonfish, Red Sea clown surgeonfish, Red Sea surgeonfish, sohal, sohal tang.
- Acanthurus carinatus, Aspisurus sohar, Chaetodon sohal, Chaetodon sohar, Choetodon sohab, Ctenodon ruppeli.
- Maximum length: 40 cm (2)
- Simple plants that lack roots, stems and leaves but contain the green pigment chlorophyll. Most occur in marine and freshwater habitats.
- Pectoral fins
- In fish, the pair of fins that are found one on each side of the body just behind the gills. They are generally used for balancing and braking.
IUCN Red List (February, 2013)
FishBase – Sohal surgeonfish (November, 2010)
World Association of Zoos and Aquariums – Sohal surgeonfish (November, 2010)
U.S. Geological Society – Sohal surgeonfish (November, 2010)
- Randall, J.E. (1996) Coastal Fishes of Oman. University of Hawaii Press, Honolulu.
- Campbell, A. and Dawes, J. (2004) Encyclopedia of Underwater Life. Oxford University Press, Oxford.
- Wilkinson, C. (2004) Status of Coral Reefs of the World: 2004. Volume 3. Australian Institute of Marine Science, Townsville, Australia.
- Carpenter, K.E. et al. (2008) One-third of reef-building corals face elevated extinction risk from climate change and local impacts. Science, 321: 560-563.
- view the contents of, and Material on, the website;
Sohal surgeonfish biology
An inquisitive and bold fish, the sohal surgeonfish aggressively defends a territory from other fish (3). Like other surgeonfishes, it has a sharp spine at the base of its tail and can use this to slash at other fish by rapidly sweeping its tail to the side (2). It feeds on various kinds of algae which it scrapes off rocks with its sharp teeth (2).
Little else is known of the sohal surgeonfish’s biology, but like other surgeonfish it probably breeds in aggregations over relatively deep, open water, the timing of which is determined by the lunar cycle (2) (3).Top
Sohal surgeonfish range
The sohal surgeonfish is found in the western Indian Ocean from the Red Sea to the Arabian Gulf (2).Top
Sohal surgeonfish habitatTop
Sohal surgeonfish status
The sohal surgeonfish is classified as Least Concern (LC) on the IUCN Red List (1).Top
Sohal surgeonfish threats
There are no known major threats to the sohal surgeonfish, but as a species that inhabits reefs, it could be adversely affected by a number of activities that degrade or destroy coral reef habitats, such as pollution and irresponsible development, as well as global climate change (7) (8). It is also captured across its range in artisanal fisheries (2).Top
Sohal surgeonfish conservation
The sohal surgeonfish has not been the target of any known conservation measures. However, its range overlaps a number of Marine Protected Areas, which may offer it some protection (1).Top
Find out more
To find out more about the conservation of fish, see:
This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact:
More »Related species
Play the Team WILD game
This species is featured in:
This species is featured in Jewels of the UAE, which showcases biodiversity found in the United Arab Emirates in association with the Environment Agency – Abu Dhabi.
Terms and Conditions of Use of Materials
Visitors to this website (End Users) are entitled to:
Additional use of flagged material
Green flagged material
Creative commons material
Any other use