Actinopterygii (ray-finned fishes) > Scorpaeniformes
(Scorpionfishes and flatheads) > Cottidae
Etymology: Radulinopsis: Latin, radula, radere = to scrape (1877) (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 0 - 20 m (Ref. 58496). Temperate
Northwest Pacific: Russian Federation and northern Japan.
Length at first maturity / Size / Weight / Age
Maturity: Lm 4.0  range ? - ? cm
Max length : 7.0 cm TL male/unsexed; (Ref. 56557)
Morphology | Morphometrics
(total): 9 - 11;
soft rays: 13 - 14;
Vertebrae: 31 - 33. Head and body above lateral line almost completely covered with small serrated scales; teeth absent on prevomer; length of anal fin base 28%-32% SL; length of caudal peduncle 15%-17% SL (Ref. 45347).
Found over sandy bottoms (Ref. 45347). Maximum depth reported at 24 m (Ref. 45347).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Sokolovskaya, T.G., A.S. Sokolovskii and E.I. Sobolevskii, 1998. A list of fishes of Peter the Great Bay (the Sea of Japan). J. Ichthyol. 38(1):1-11. (Ref. 27683)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 6.1 - 18.3, mean 12.4 (based on 126 cells).
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00338 - 0.02247), 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
): 3.2 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (25 of 100) .