Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Scorpaeniformes
(Scorpionfishes and flatheads) > Cottidae
Etymology: Cottiusculus: Greek, kottos = a fish, diminutive; nihonkaiensis: Named for Nihonkai, the Japanese name of the Sea of Japan, which includes most of the distributional range of the species.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 100 - 150 m (Ref. 83439). Temperate
Northwestern Pacific: from the Sea of Japan coasts of Hokkaido, Honshu, Kyushu and the Korean Peninsula, and Volcano Bay, Hokkaido.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.8 cm SL male/unsexed; (Ref. 83439); 6.1 cm SL (female)
Morphology | Morphometrics
(total): 6 - 8;
soft rays: 10 - 13. This species is distinguished by the following set of characters: simple or weakly bicuspid nasal spines; uppermost preopercular spine not barbed; first dorsal fin not elongated; lateral line extending past base of caudal fin, with 2 or 3 lateral line pores on caudal fin; with ventral lateral and lateral line cirri (Ref. 83439).
Usually occurs on sandy-muddy bottoms (Ref. 83439).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kai, Y. and T. Nakabo, 2009. Taxonomic review of the genus Cottiusculus (Cottoidei: Cottidae) with description of a new species from the sea of Japan. Ichthyol. Res. 56(3):213-226. (Ref. 83439)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00341 - 0.02227), b=3.12 (2.89 - 3.35), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.3 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (32 of 100) .