Actinopteri (ray-finned fishes) > Acanthuriformes
(Surgeonfishes) > Pomacanthidae
Etymology: Genicanthus: Greek, geny, -yos = face, jaw + Greek, akantha = thorn (Ref. 45335). More on author: Randall.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; non-migratory; depth range 24 - 110 m (Ref. 90102), usually 50 - 100 m (Ref. 48391). Tropical; 19°N - 18°S
Eastern Indian Ocean: Cocos-Keeling Atoll. Pacific Ocean: Philippines, Palau, Guam, Cook Island and the Society Islands. Recently reported from Tonga (Ref. 53797). Distribution may be expanded with more deep reef exploration.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 18.0 cm TL male/unsexed; (Ref. 48636)
Schools along steep current-swept outer reef drop-offs from 45 to at least 97 m. Forms harems of 3-7 individuals. Feeds on plankton. Rarely exported through the aquarium trade (Ref. 48391). At Canderawasih Bay common depth range is 20-25 m (Ref. 90102).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Myers, R.F., 1991. Micronesian reef fishes. Second Ed. Coral Graphics, Barrigada, Guam. 298 p. (Ref. 1602)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 21.5 - 28.9, mean 26.1 °C (based on 33 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.03311 (0.01558 - 0.07036), b=2.88 (2.70 - 3.06), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.45 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (33 of 100) .
Nutrients (Ref. 124155
): Calcium = 55.8 [32.5, 90.0] mg/100g ; Iron = 0.682 [0.431, 1.115] mg/100g ; Protein = 18.6 [17.5, 19.6] % ; Omega3 = 0.148 [0.090, 0.241] g/100g ; Selenium = 24.4 [12.0, 45.8] μg/100g ; VitaminA = 163 [51, 527] μg/100g ; Zinc = 1.17 [0.77, 1.75] mg/100g (wet weight);