Actinopteri (ray-finned fishes) > Acanthuriformes
(Surgeonfishes) > Pomacanthidae
Etymology: Genicanthus: Greek, geny, -yos = face, jaw + Greek, akantha = thorn (Ref. 45335). More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; non-migratory; depth range 20 - 45 m (Ref. 9710). Tropical; 30°N - 23°S
Western Pacific: Indonesia to Fiji, north to the Ryukyu Islands, south to Rowley Shoals in the eastern Indian Ocean and New Caledonia. Recently recorded from Tonga (Ref. 53797).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 18.0 cm TL male/unsexed; (Ref. 9710)
Generally seen in pairs on steep outer reef slopes, drop-offs (Ref. 9710), in caves or along the bases of boulders (Ref.48636); in rich coral growth interspersed with sand (Ref. 37816). Usually occurs in loose groups of females dominated by a male. Sometimes feeds on plankton high above the substrate (Ref.48636).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Steene, R.C., 1978. Butterfly and angelfishes of the world. A.H. & A.W. Reed Pty Ltd., Australia. vol. 1. 144 p. (Ref. 4859)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Fisheries: of no interest; aquarium: commercial
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 24.5 - 28.5, mean 27.1 °C (based on 90 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) .