Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; benthopelagic. Temperate
Northwest Pacific: southern Sea of Japan and East China Sea.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm SL male/unsexed; (Ref. 559)
soft rays: 9 - 10. Diagnosis: Distinguished from its congeners with the following characters: dorsal-fin rays XI, 14-16 (usually 15); scales above lateral line 10-15 (usually 12-14), below 20-27 (usually 22-25); maxilla scaly; 10 pores on and behind chin, including 1 very small pore near symphysis on each side (may be difficult to detect, obscured by short dense papillae), 2 moderate-sized pores anteroventrally on each dentary, a single large pore ventrally, at articulation of dentary (2 posteriormost usually slit-like and concave), its posterior part scaly; shape of dorsal- and anal-fin rays rounded and slightly angulated, respectively; cluster of very short dense papillae on fleshy lower lip; body often with two indistinct oblique dark bands, the first descending from nape to behind pectoral fin and then running to posterior part of soft anal-fin rays, and the second from base of anterior 3rd or 4th dorsal-fin spine and soft dorsal-fin base, curving backwards through lateral line to upper part of caudal peduncle (Ref. 56360).
Inhabits rocky reefs in coastal waters (Ref. 9137) and river mouths; usually over sandy bottoms near rocky shores, from summer to early winter (Ref. 56360).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Iwatsuki, Y. and T. Nakabo, 2005. Redescription of Hapologenys nigripinnis (Schlegel in Temminck and Schlegel, 1843), a senior synonym of H. nitens Richardson, 1844, and a new species from Japan. Copeia 2005(4):854-867. (Ref. 56360)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic Level (Ref. 69278
): 4.0 ±0.65 se; Based on food items.
Vulnerability (Ref. 59153
): Moderate vulnerability (39 of 100) .