Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 0 - 100 m (Ref. 50550), usually 10 - 70 m (Ref. 56527). Temperate; 88°N - 40°N, 135°E - 60°W
North Pacific: Hokkaido, Japan and Sea of Okhotsk to the Bering Sea. Arctic Canada.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 112 cm TL male/unsexed; (Ref. 56527)
Dorsal spines (total): 83 - 88; Anal spines: 0; Anal soft rays: 53 - 54. Four pairs of strong canines on anterior parts of both jaws; molar teeth on prevomerine and palatal bones and posterior part of lower jaw. Dorsal fin without soft rays. Pelvic fins absent.
Body shape (shape guide): elongated; Cross section: circular.
Found on rocky bottoms (Ref. 559). Benthic (Ref. 58426). Feeds on hard-shelled invertebrates (Ref. 28499).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Eggs are very large.
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 2025-2)
Threat to humans
Harmless
Human uses
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