Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Pomacentridae
(Damselfishes) > Pomacentrinae
Etymology: Chromis: Greek, chromis = a fish, perhaps a perch (Ref. 45335); onumai: Named for Hisashi Onuma, who first discovered the species.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 51 - 90 m (Ref. 75861). Temperate
Northwest Pacific: Taiwan and Japan.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.6 cm SL male/unsexed; (Ref. 75861)
Morphology | Morphometrics
soft rays: 12 - 13;
Vertebrae: 26. This species is characterized by the following: D XIV, 12-13; A II, 12-13; pectoral fin rays 19-20; 3 spiniform caudal fin rays; 16-17 tubed lateral line scales; gill rakers 5-7 + 19-20 = 25-27; white spots about a pupil size posteriorly, 1 at rear base of dorsal fin, another at the rear base of anal fin, and the third at mid base of caudal fin (these 3 spots usually fading after death, but may be visible as a pale area on preserved specimen) (Ref. 75861).
Life history characteristics for the family specify that this group is oviparous, with distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).
Senou, H. and T. Kudo, 2007. A new species of the genus Chromis (Perciformes: Pomacentridae) from Taiwan and Japan. Bull. Nat. Mus. Nat. Sci. Ser. A. Suppl. 1:51-57. (Ref. 75861)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 17.2 - 23.7, mean 21.9 (based on 22 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01778 (0.00786 - 0.04025), b=2.99 (2.81 - 3.17), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.0 ±0.1 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (29 of 100) .