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Text and photos by Nick Baker, unless credited to others.
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Tangs  Zebrasoma spp.
   

Fig 1
 

Fig 2
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

Order : Uncertain
Family : ACANTHURIDAE
Species : Zebrasoma spp.
Maximum Length : members of the genus may reach up to 40 cm total length.

According to Fishbase, as of 2020 there are 7 species of 'Tang' recognised in the genus Zebrasoma, 5 of which occur in Southeast Asia. The genus is part of the Acanthuridae family, which are also known as surgeonfishes.

The name Zebrasoma is derived from the zebra-like vertical stripes on the flanks of some species. Other species, however, are spotted or plain coloured, for example the brightly coloured Yellow Tang Zebrasoma flavescens, which is a popular aquarium fish.

Tangs have large dorsal and anal fins: these typically lie flat along the top and underside of the body, but can be extended as a form of display. When extended, the rounded dorsal fin gives the appearance of a sail.

Their diet comprises leafy or filamentous algae.

Zebrasoma velifer, featured here, is a typical example of the genus. Its vernacular name is Sailfin Tang (or 'Zebra Sailfin Tang'). This is one of the larger members of the genus, which can grow up to 40 cm total length. It occurs in quiet lagoons and coral reefs, as well as wave-dominated seaward reefs, and is widespread in the warm, tropical seas of Southeast Asia and beyond.


Fig 1 : Sailfin Tang from French Polynesia, in the central Pacific Ocean. A small group were found in a shallow, sandy lagoon. In this image, the sail-like dorsal fin is lying flat.

Fig 2 : This calm, tropical lagoon in French Polynesia supports small shoals of Sailfin Tang.


References :

Allen, G. 1988. Marine Fishes of Southeast Asia. Western Australian Museum.


Links :

Fishbase - Zebrasoma velifer