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Teleostei (teleosts) > Acanthuriformes (Surgeonfishes) > Acanthuridae (Surgeonfishes, tangs, unicornfishes) > Acanthurinae
Etymology: Ctenochaetus: Greek, kteis, ktenos = comb + Greek, chaite = hair (Ref. 45335).
More on authors: Quoy & Gaimard.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; reef-associated; depth range 0 - 60 m (Ref. 128797), usually 6 - 30 m (Ref. 58652). Tropical; 24°C - 28°C (Ref. 27115); 35°N - 34°S, 99°E - 77°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Indo-Pacific: throughout the region except the Hawaiian, Marquesas and Easter islands. Record from Baker Island (US Minor Islands) based on a photograph (Ref. 42056). Absent from Malden and Jarvis islands (Ref. 1602).

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 10 - ? cm
Max length : 26.0 cm TL male/unsexed; (Ref. 2334); common length : 18.0 cm TL male/unsexed; (Ref. 3146); max. published weight: 437.00 g (Ref. 125599); max. reported age: 36 years (Ref. 52229)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 8; Dorsal soft rays (total): 27 - 31; Anal spines: 3; Anal soft rays: 24 - 28. This species is distinguished by the following characters: body deep and compressed, its depth 1.9-2.3 times in standard length or SL; mouth small, teeth numerous (> 30 in jaws of adults), movable, slender and elongate, with expanded incurved tips which are denticulate on the lateral margin (6 denticulations on upper and 4 on lower teeth); total gill rakers on first gill arch 27-36; a continuous unnotched dorsal fin with VIII,27-31; AIII,24-28; caudal fin lunate, concavity 3.7-6 times in SL; a lancet-like spine on caudal peduncle which folds into a deep horizontal groove; colour dark olive to yellowish brown with blue or blue-grey lengthwise lines on body and small orange spots on head and nape; dorsal and anal fins with about 5 lengthwise dark bluish bands; pectoral fins pale with brownish yellow rays; a small blackish spot at rear base of dorsal fin of juveniles and small adults (Ref. 9808).

Inhabits reef flats and lagoon and seaward reefs to a depth of over 30 m. Occurs over coral (Ref. 58534), rock, pavement, or rubble substrates. May occur singly or in small to very large, often mixed-species aggregations (Ref. 48637). Feeds on surface film of blue-green algae and diatoms (making this species a key link in the ciguatera food chain) as well as on various small invertebrates.

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

In Tahiti, spawning starts near full moon with the formation of schools of several thousand fish at various depths. The fish remain almost motionless for between 1 to 3 hrs, then change their normal color to pale grey. About 4 or 5 fishes rise a few yards above main school and swim around each other discharging milt and eggs, then return to former place and replaced by another group to spawn.

Main reference Upload your references | References | Coordinator : Randall, John E. | Collaborators

Randall, J.E and K.D. Clements, 2001. Second revision of the surgeonfish genus Ctenochaetus (Perciformes: Acanthuridae), with descriptions of two new species. Indo-Pac. Fish. (32):33 p. (Ref. 42056)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 07 May 2010

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Reports of ciguatera poisoning (Ref. 9513)

Human uses

Fisheries: commercial; aquarium: commercial

FAO - Publication: search | FishSource | Sea Around Us

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Estimates based on models

Preferred temperature (Ref. 123201): 24.6 - 29, mean 27.8 °C (based on 1078 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.02344 (0.01927 - 0.02851), b=2.97 (2.92 - 3.02), in cm total length, based on LWR estimates for this species (Ref. 93245).

Trophic level (Ref. 69278): 2.0 ±0.0 se; based on diet studies.

Generation time: 1.4 (1.1 - 2.7) years. Estimated as median ln(3)/K based on 14 growth studies.

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (tmax = 36; K=0.87).

Prior r = 0.44, 95% CL = 0.29 - 0.66, Based on 1 data-limited stock assessment.

Fishing Vulnerability (Ref. 59153): Low vulnerability (18 of 100).

Price category (Ref. 80766): Medium.

Nutrients (Ref. 124155): Calcium = 35.1 [21.3, 58.3] mg/100g; Iron = 0.26 [0.14, 0.63] mg/100g; Protein = 18.2 [16.9, 19.4] %; Omega3 = 0.121 [0.078, 0.192] g/100g; Selenium = 22.9 [13.4, 41.9] μg/100g; VitaminA = 34.9 [8.0, 142.9] μg/100g; Zinc = 0.379 [0.285, 1.299] mg/100g (wet weight); based on nutrient studies.

Ctenochaetus striatus (Quoy & Gaimard, 1825)