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; 0°C - ; 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. 124695)
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 (0.01551 - 0.07068), 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);