Sealife guideThe blue tang surgeonfishAcanthurus coeruleus

Last updated on 09/17/2024 at 11:51 PM
The blue tang surgeonfish (Acanthurus coeruleus)
The blue tang surgeonfish (Acanthurus coeruleus)
Taxonomy
  • Common name: Blue tang surgeonfish, Blue tang, blue doctorfish
  • French name: Poisson chirurgien bleu, poisson chirurgien bayolle
  • Spanish name: Cirujano azul
  • Scientific name: Acanthurus coeruleus (Bloch & Schneider, 1801)
  • Family name: Acanthuridae
  • Order name: Acanthuriformes
  • Class name: Actinopterygii
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 !
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)
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 (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
Doctorfish (Acanthurus chirurgus)
Doctorfish
(Acanthurus chirurgus)
Mimic surgeonfish (Acanthurus pyroferus)
Mimic surgeonfish
(Acanthurus pyroferus)
Ocean tang (Acanthurus bahianus)
Ocean tang
(Acanthurus bahianus)
Orangeband surgeonfish (Acanthurus olivaceus)
Orangeband surgeonfish
(Acanthurus olivaceus)
Powder blue tang (Acanthurus leucosternon)
Powder blue tang
(Acanthurus leucosternon)
Sohal surgeonfish (Acanthurus sohal)
Sohal surgeonfish
(Acanthurus sohal)
Striped surgeonfish (Acanthurus lineatus)
Striped surgeonfish
(Acanthurus lineatus)
Yellowmask surgeonfish (Acanthurus mata)
Yellowmask surgeonfish
(Acanthurus mata)
Within the same family
Bluetail unicornfish (Naso caeruleacauda)
Bluetail unicornfish
(Naso caeruleacauda)
Humpback unicornfish (Naso brachycentron)
Humpback unicornfish
(Naso brachycentron)
Indian sailfin surgeonfish (Zebrasoma desjardinii)
Indian sailfin surgeonfish
(Zebrasoma desjardinii)
Kole tang (Ctenochaetus strigosus)
Kole tang
(Ctenochaetus strigosus)
Orangespine unicornfish (Naso lituratus)
Orangespine unicornfish
(Naso lituratus)
Paletail unicornfish (Naso brevirostris)
Paletail unicornfish
(Naso brevirostris)
Palette surgeonfish (Paracanthurus hepatus)
Palette surgeonfish
(Paracanthurus hepatus)
Sailfin tang (Zebrasoma velifer)
Sailfin tang
(Zebrasoma velifer)
Discover also
Banded shrimpgoby (Cryptocentrus cinctus)
Banded shrimpgoby
(Cryptocentrus cinctus)
Bluescaled wrasse (Cirrhilabrus cyanopleura)
Bluescaled wrasse
(Cirrhilabrus cyanopleura)
Bluestriped fangblenny (Plagiotremus rhinorhynchos)
Bluestriped fangblenny
(Plagiotremus rhinorhynchos)
Citron coral goby (Gobiodon citrinus)
Citron coral goby
(Gobiodon citrinus)
Eightband butterflyfish (Chaetodon octofasciatus)
Eightband butterflyfish
(Chaetodon octofasciatus)
Golden trevally (Gnathanodon speciosus)
Golden trevally
(Gnathanodon speciosus)
Scarlet soldierfish (Myripristis pralinia)
Scarlet soldierfish
(Myripristis pralinia)
Stoplight parrotfish (Sparisoma viride)
Stoplight parrotfish
(Sparisoma viride)
The marine species in the Caribbean
Atlantic bigeye (Priacanthus arenatus)
Atlantic bigeye
(Priacanthus arenatus)
Bar jack (Caranx ruber)
Bar jack
(Caranx ruber)
Bonnethead shark (Sphyrna tiburo)
Bonnethead shark
(Sphyrna tiburo)
Chain moray (Echidna catenata)
Chain moray
(Echidna catenata)
Gray snapper (Lutjanus griseus)
Gray snapper
(Lutjanus griseus)
Graysby (Cephalopholis cruentata)
Graysby
(Cephalopholis cruentata)
Lemon shark (Negaprion brevirostris)
Lemon shark
(Negaprion brevirostris)
Short bigeye (Pristigenys alta)
Short bigeye
(Pristigenys alta)
Dive centers
Centre de plongée des Ilets
'Les Ilets' dive center
Noa Plongée
Noa dive center
Abonnez-vous !

Our latestUpdates

The Kemp's ridley sea turtle
Saturday, September 5th 2026
The Kemp's ridley sea turtle
The Kemp's ridley sea turtle is the smallest of the seven species of sea turtles and one of the most endangered. Discover this fascinating species, its unique biological characteristics, and its remarkable mass nesting behavior known as an arribada, when thousands of females gather on beaches to lay their eggs.
The skunk cleaner shrimp
Friday, August 28th 2026
The skunk cleaner shrimp
Discover the skunk cleaner shrimp (Lysmata amboinensis), a small tropical shrimp famous for cleaning parasites and debris from reef fish.
The islands of Japan: an archipelago of a thousand faces
Wednesday, August 26th 2026
The islands of Japan: an archipelago of a thousand faces
Discover the islands of Japan, a vast archipelago with diverse landscapes ranging from volcanic islands and tropical beaches to traditional villages and the major islands of Honshu, Hokkaido, Kyushu, and Shikoku.
Photo of the Day
Dauphin à flancs blancs du Pacifique (Sagmatias obliquidens)
Dauphin à flancs blancs du Pacifique
(Sagmatias obliquidens)