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Acanthuriformes (Surgeonfishes) >
Acanthuridae (Surgeonfishes, tangs, unicornfishes) > Acanthurinae
Etymology: Acanthurus: Greek, akantha = thorn + Greek, oura = tail (Ref. 45335).
Eponymy: Achilles was the mythical Greek hero of the Trojan War. His only vulnerable spot was his heel (hence ‘Achilles’ heel’). The tang has a (roughly) heel-like mark on its body. (Ref. 128868), visit book page.
More on author: Shaw.
Taxonomic Remarks
Distribution to be checked.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
marin récifal; non migrateur (Ref. 52884); profondeur 0 - 10 m (Ref. 27115), usually 0 - 4 m (Ref. 9710). Tropical; 28°N - 26°S, 143°E - 109°W
Western Pacific: oceanic islands of Oceania to the Hawaiian and Pitcairn islands. Also known from Wake, Marcus, and Mariana islands. Eastern Central Pacific: southern tip of Baja California, Mexico (Ref. 9267) and other offshore islands.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 24.0 cm TL mâle / non sexé; (Ref. 9710)
Épines dorsales (Total) : 9; Rayons mous dorsaux (Total) : 29 - 33; Épines anales: 3; Rayons mous anaux: 26 - 29. Dark brown, nearly black in color. Erectile spine (sharp and forward-pointing) on each side of caudal peduncle which folds down into a groove. Mouth small, snout noticeably extended. Light blue ring around chin and presence of spot of same color on gill cover at angle of gill opening. Dorsal fin with soft part having longer base than spinous part. Juveniles lack the large orange spot on caudal area.
Body shape (shape guide): short and / or deep; Cross section: compressed.
Adults occur in clear seaward reefs, usually in groups (Ref. 9710). Benthopelagic (Ref. 58302). They feed on filamentous and small fleshy algae (Ref. 9267). Monogamous (Ref. 52884). Spine in caudal peduncle may be venomous. Size of metamorphosis from postlarva stage to juvenile is 6 cm (Ref. 9267). This species sometimes hybridizes with A. nigricans (Ref. 9808).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Monogamous mating is observed as both facultative and social (Ref. 52884).
Randall, J.E., 1956. A revision of the surgeonfish genus Acanthurus. Pac. Sci. 10(2):159-235. (Ref. 1920)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Traumatogenic (Ref. 4690)
Utilisations par l'homme
Pêcheries: commercial; Aquarium: Commercial
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Estimations basées sur des modèles
Température préférée (Réf.
123201): 25.8 - 28.3, mean 27.4 °C (based on 404 cells).
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02291 (0.01098 - 0.04781), b=2.96 (2.79 - 3.13), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 2.0 ±0.00 se; based on food items.
Résilience (Réf.
120179): Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Vulnérabilité de la pêche (Ref.
59153): Low vulnerability (14 of 100).
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Nutriments (Ref.
124155): Calcium = 77.7 [33.7, 236.7] mg/100g; Iron = 0.837 [0.317, 2.103] mg/100g; Protein = 18.2 [16.9, 19.4] %; Omega3 = 0.0938 [, ] g/100g; Selenium = 13 [4, 39] μg/100g; VitaminA = 45.8 [10.8, 181.2] μg/100g; Zinc = 3.17 [0.99, 6.04] mg/100g (wet weight);