Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 10 - 217 m (Ref. 86942), usually - m (Ref. ). Temperate; 0°C -
Western Pacific: Japan and China. Recently reported from the Chesterfield Islands (Ref. 11897).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 15.0 cm SL male/unsexed; (Ref. 559)
Morphology | Morphometrics
(total): 43-44. Recognized by the black spot on the head. Males lack dorsal filaments but have a long extended ventral fin ray (Ref. 48636).
Found on sandy bottoms in shallow waters (Ref. 32211). Seen singly or in coastal sand slopes (Ref. 48636). Feed on zooplankton (Ref. 9137).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Also Ref. 103751.
Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text). (Ref. 559)
IUCN Red List Status (Ref. 124695)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 17.9 - 28.1, mean 26.2 °C (based on 564 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.45 se; based on food items.
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .