Sealife guideThe blue tang surgeonfishAcanthurus coeruleus
Last updated on 09/17/2024 at 11:51 PM

The blue tang surgeonfish (Acanthurus coeruleus)
Taxonomy
English names
Blue tang surgeonfishBlue tangBlue doctorfish
French namesPoisson chirurgien bleuPoisson chirurgien bayolle
Spanish namesCirujano azul
Scientific nameAcanthurus coeruleus (Bloch & Schneider, 1801)
FamilyAcanthuridae
OrderAcanthuriformes
ClassActinopterygii
Description
The blue tang surgeonfish is distinguished by its oval and flattened body covered with small, smooth scales. It features a bright blue color that intensifies with age and may have yellowish hues when it is young.

Note the presence of a sharp, lateral spine at the base of the blue tang's tail !
On each side of its tail, the blue tang surgeonfish has a sharp spine, resembling a scalpel, which helps it defend against predators.
The blue tang surgeonfish typically measures about 10 to 12 inches in length with a maximum size of up to 16 inches.
Geographic range
The blue tang surgeonfish is primarily found in the tropical waters of the western Atlantic ocean. Its range extends from the coasts of Florida and the Bahamas to the Caribbean, including the Greater Antilles and the Lesser Antilles, as well as along the coasts of the Sargasso sea.
Habitat
The blue tang surgeonfish typically inhabits coral reefs, seagrass beds and rocky areas where it hides in crevices. It is commonly found in shallow waters up to about 65 feet deep.

The blue tang surgeonfish (Acanthurus coeruleus)
Diet
The blue tang surgeonfish is an omnivore with a strong herbivorous tendency. It primarily feeds on algae but also consumes small marine organisms.
Did you know ?
The blue tang surgeonfish gets its name from the presence of a sharp, scalpel-like spine on either side of its tail which it uses to keep predators at bay !

The blue tang surgeonfish (Acanthurus coeruleus)
The blue tang surgeonfish is listed as many other marine species within The IUCN Red List of threatened species. The blue tang surgeonfish appears in the IUCN Red List since 2012 within the category Least Concern !
Within the same genus

DoctorfishAcanthurus chirurgus

Japanese surgeonfishAcanthurus japonicus

Mimic surgeonfishAcanthurus pyroferus

Palelipped surgeonfishAcanthurus leucocheilus

Powder blue tangAcanthurus leucosternon

Sohal surgeonfishAcanthurus sohal

Striped surgeonfishAcanthurus lineatus

Yellowfin surgeonfishAcanthurus xanthopterus
Within the same family

Bluetail unicornfishNaso caeruleacauda

Humpback unicornfishNaso brachycentron

Indian sailfin surgeonfishZebrasoma desjardinii

Kole tangCtenochaetus strigosus

Orangespine unicornfishNaso lituratus

Paletail unicornfishNaso brevirostris

Palette surgeonfishParacanthurus hepatus

Sailfin tangZebrasoma velifer
Discover also

Black margateAnisotremus surinamensis

Blue-green chromisChromis viridis

Giant grouperEpinephelus lanceolatus

Goldflake angelfishApolemichthys xanthopunctatus

Goldspotted eelMyrichthys ocellatus

Gray triggerfishBalistes capriscus

Ornate wrasseThalassoma pavo

Tarry hogfishBodianus bilunulatus
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