Shorefishes of the Tropical Eastern Pacific Online Information System
Updated: 06/12/2008  
Version: 1.0.4.53  

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    Acanthurus  
Perciformes  -  Acanthuridae  -  Acanthurus  -  Acanthurus achilles

Acanthurus achilles

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  black + large orange blotch on rear body
 
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Acanthurus achilles Shaw, 1803


Achilles tang


Body an elongate oval; head profile steep; eye high on the head; mouth small, protrusible, low on head;
 teeth on jaws fixed, with flattened, notched tips, 8-28 on each jaw; gill rakers 16-20; dorsal rays IX, 29-33; anal rays III, 26-29; pectoral rays 16; pelvic fin I, 5; a single depressible spine fits into a groove on the side of the base of the tail; tail fin concave; scales very small, rough; lateral line complete.

Bluish black with a large elliptical orange patch posteriorly on body;
 a white slash or short bar covering middle of opercular membrane; tail fin with broad orange bar and white rear margin.


Size: to 26 cm.

Habitat: shallow surge areas of rocky and coral reefs.


Depth: 0-10 m.


The tropical central Pacific; in the eastern Pacific it has been seen near Cape San Lucas (Baja California) and inside the western Gulf, and a pelagic juvenile was collected near Clipperton Island.

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