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)
Yellowfin surgeonfish (Acanthurus xanthopterus)
Yellowfin surgeonfish
(Acanthurus xanthopterus)
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
Common snook (Centropomus undecimalis)
Common snook
(Centropomus undecimalis)
Cottonwick grunt (Haemulon melanurum)
Cottonwick grunt
(Haemulon melanurum)
Crocodilefish (Cymbacephalus beauforti)
Crocodilefish
(Cymbacephalus beauforti)
Gray snapper (Lutjanus griseus)
Gray snapper
(Lutjanus griseus)
Halimeda ghost pipefish (Solenostomus halimeda)
Halimeda ghost pipefish
(Solenostomus halimeda)
Leafy sea dragon (Phycodurus eques)
Leafy sea dragon
(Phycodurus eques)
Peacock grouper (Cephalopholis argus)
Peacock grouper
(Cephalopholis argus)
Polka dot batfish (Ogcocephalus radiatus)
Polka dot batfish
(Ogcocephalus radiatus)
The marine species from Caribbean sea
Bearded fireworm (Hermodice carunculata)
Bearded fireworm
(Hermodice carunculata)
Chocolate chip sea cucumber (Isostichopus badionotus)
Chocolate chip sea cucumber
(Isostichopus badionotus)
Hawksbill sea turtle (Eretmochelys imbricata)
Hawksbill sea turtle
(Eretmochelys imbricata)
Hogfish (Lachnolaimus maximus)
Hogfish
(Lachnolaimus maximus)
Mutton snapper (Lutjanus analis)
Mutton snapper
(Lutjanus analis)
Red grouper (Epinephelus morio)
Red grouper
(Epinephelus morio)
Sand tilefish (Malacanthus plumieri)
Sand tilefish
(Malacanthus plumieri)
Spotted goatfish (Pseudupeneus maculatus)
Spotted goatfish
(Pseudupeneus maculatus)
Dive centers
Centre de plongée des Ilets
'Les Ilets' dive center
Noa Plongée
Noa dive center
Vous abonnez !

Our latestUpdates

Faroe islands
Thursday, May 7th 2026
Faroe islands
Discover the Faroe islands, a remote archipelago between Iceland and Norway known for its dramatic cliffs, colorful villages, and untouched Nordic landscapes. Find travel tips, itineraries, hiking guides, local culture, and inspiration to explore this unique destination in the North Atlantic.
The short-finned pilot whale
Wednesday, May 6th 2026
The short-finned pilot whale
Discover the tropical pilot whale (Globicephala macrorhynchus), a highly social large cetacean from tropical and subtropical waters, specialized in deep dives in search of squid.
Where to see groupers in the Mediterranean ?
Thursday, April 23rd 2026
Where to see groupers in the Mediterranean ?
Discover where to see groupers in the Mediterranean: the best diving spots and protected marine areas to observe this iconic fish in its natural habitat.
Photo of the Day
Labre capitaine (Lachnolaimus maximus)
Labre capitaine
(Lachnolaimus maximus)