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Teleostei (teleosts) > Perciformes/Cottoidei (Sculpins) > Cottidae (Sculpins)
Etymology: Cottus: Greek, kottos = a fish (Ref. 45335).
Eponymy: One of the ‘heavenly twins’ in Greek mythology (see also Castor). The etymology is not explicit, but apparently so named because the author viewed this species as a ‘twin’ to Cottus gobio. (Ref. 128868), visit book page.
More on author: Günther.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal; amphidromous (Ref. 51243). Temperate; 40°N - 31°N

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Asia: in mountain streams of Honshu, Shikoku and Kyushu, Japan.

Length at first maturity / Size / Weight / Age

Maturity: L_m 7.4, range 6 - 9.5 cm
Max length : 15.0 cm SL male/unsexed; (Ref. 559); max. reported age: 4 years (Ref. 74384)

Bottom-dwelling fish of mountain streams.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

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. 130435: Version 2024-2)

Least Concern (LC) ; Date assessed: 23 July 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

FAO - Publication: search | FishSource |

More information

Trophic ecology
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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00589 (0.00281 - 0.01234), b=3.15 (2.97 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.4 ±0.5 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (tm=2; Fec=200).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Cottus pollux Günther, 1873