Acanthurus triostegus

Acanthurus triostegus, also known as the convict tang, convict surgeonfish, or manini, is a small surgeonfish in family Acanthuridae of the order Perciformes.[1][2] It is typically about 17 cm (7 in) long, but some individuals may reach 27 cm.[2] These tangs are widespread. They are found in the Indo-Pacific except for seas around the Arabian Peninsula, in the Pacific at the Hawaiian Islands, and in the Eastern Pacific they are found in the lower Gulf of California and down to Panama, including the Revillagigedo Islands, Clipperton Island, Cocos Islands, and Galápagos Islands with some reports throughout the Mediterranean and Adriatic Sea most likely entering through the Suez Canal.

Acanthurus triostegus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Family: Acanthuridae
Genus: Acanthurus
Species:
A. triostegus
Binomial name
Acanthurus triostegus
Synonyms

Teuthis elegans Garman, 1899

Description

The convict tang is so called because of its bold black stripes on a yellowish background. It is a laterally-compressed oval-shaped fish[3] with a maximum length of about 26–27 cm (10–11 in).[2][3] The head is small with a pointed snout and a terminal mouth with thick lips. It has six black stripes which distinguishes it from the zebra tang (Acanthurus polyzona) which has nine, and has a more restricted range in the Indian Ocean. The first black stripe is oblique and passes through the eye. There are two black spots on the caudal peduncle, and on each side there is a sharp, retractable spine, which is used in offence or defence.[3]

Distribution and habitat

Acanthurus triostegus occurs in the tropical Indo-Pacific region. Its range extends from the East African coast and Madagascar to southwestern Japan, Australia and Central America, including many Pacific island groups. It is found over hard bottoms in lagoons, reef slopes, bays and estuaries. Juveniles are common in tide pools, and larger fish are found at depths down to about 90 m (300 ft).[1]

References
  1. McIlwain, J., Choat, J.H., Abesamis, R., Clements, K.D., Myers, R., Nanola, C., Rocha, L.A., Russell, B. & Stockwell, B. (2012). Acanthurus triostegus. The IUCN Red List of Threatened Species doi:10.2305/IUCN.UK.2012.RLTS.T177965A1504553.en
  2. Froese, Rainer and Pauly, Daniel, eds. (2019). "Acanthurus triostegus" in FishBase. December 2019 version.
  3. Lamare, Véronique; Mitel, Cédric (4 August 2018). "Acanthurus triostegus" (in French). DORIS. Retrieved 9 August 2020.
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