Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; non-migratory; depth range 0 - 452 m (Ref. 50550), usually 100 - 150 m (Ref. 56580). Temperate; 1°C - 9°C (Ref. 56580); 62°N - 46°N, 171°E - 121°W (Ref. 57307)
North Pacific: Sea of Okhotsk, Sea of Japan (Ref. 559), Kuril Islands (Ref. 56580) and the Bering Sea to Puget Sound, Washington, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 12.0 cm TL male/unsexed; (Ref. 56580); common length : 10.0 cm TL male/unsexed; (Ref. 56580); max. published weight: 24.00 g (Ref. 56580); max. reported age: 7 years (Ref. 56580)
Dorsal spines (total): 8 - 11; Dorsal soft rays (total): 5 - 7; Anal spines: 0; Anal soft rays: 8 - 11; Vertebrae: 35 - 37. Lower lobe of pectoral fin with 7 to 8 free rays. A barbel is present on the tip of the snout. Dorsum highly elevated at nape. Branchial membrane free from isthmus. Supralateral and infralateral plates attached to each other on lateral line. Dorsal fins close to each other. Lateral line plates less than 15.
Rocky sand, gravel, or pebble bottoms. Frequently covered by featherlike polyps (small hydroid animals) (Ref. 2850).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Fisheries: bycatch
Tools
Special reports
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Internet sources
Estimates based on models
Preferred temperature (Ref.
123201): 3.5 - 7.2, mean 5.4 °C (based on 78 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00189 - 0.01213), b=3.05 (2.83 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.2 ±0.1 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).