Actinopterygii (ray-finned fishes) > Scorpaeniformes
(Scorpionfishes and flatheads) > Cottidae
Etymology: Cottiusculus: Greek, kottos = a fish, diminutive. More on author: Jordan, Starks.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 20 - 300 m (Ref. 56557). Temperate
Northwest Pacific: known only from off the Pacific coast of Tohoku District, Japan, Fukushima and Miyagi Prefectures.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 10.0 cm TL male/unsexed; (Ref. 56557)
(total): 6 - 8;
soft rays: 10 - 13. This species is distinguished by the following set of characters: deeply bicuspid nasal spines; uppermost preopercular spine not barbed; elongated first dorsal fin in males; lateral line extend past caudal fin base, with 2 or 3 lateral line pores on caudal fin; no ventral lateral cirrus and lateral line cirri (Ref. 83439).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 115185)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 6 - 16.8, mean 14.5 (based on 57 cells).
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00708 (0.00295 - 0.01699), b=3.14 (2.94 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.40 se; Based on food items.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100) .