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Hemitripterus villosus (Pallas, 1814)

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Hemitripterus villosus   AquaMaps   Data sources: GBIF OBIS
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Image of Hemitripterus villosus
Hemitripterus villosus
Picture by Markevich, A.I.

Japan country information

Common names: Kemushikajika, Kemushi-kajika, Sea raven
Occurrence: native
Salinity: marine
Abundance: common (usually seen) | Ref: Sokolovskaya, T.G., A.S. Sokolovskii and E.I. Sobolevskii, 1998
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs in northern Japan. Also Ref. 2850, 11230.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ja.html
National Fisheries Authority: http://www.maff.go.jp/eindex.html
Occurrences: Occurrences Point map
Main Ref: Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984
National Database:

Common names from other countries

Harilik juushärg, 绒杜父鱼, 삼세기, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Perciformes/Cottoidei (Sculpins) > Agonidae (Poachers) > Hemitripterinae
Etymology: Hemitripterus: Greek, hemi = half + Greek, tres, tria = three + Greek, pteron = wing, fin (Ref. 45335).
  More on author: Pallas.

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

Marine; demersal; depth range 0 - 550 m (Ref. 50550).   Temperate; 66°N -

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

Northwest Pacific: Karaginskiy and Commander islands, Bering Sea to Okhotsk and Japan seas; one record from the western Gulf of Alaska.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 35.0 cm SL male/unsexed; (Ref. 559)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 17 - 19; Dorsal soft rays (total): 11 - 13; Anal spines: 0; Anal soft rays: 12 - 15. Body covered with many small tubercles; head large, with numerous bony humps and ridges; spinous dorsal fin deeply emarginate, its base longer than that of the soft dorsal fin; jaws, prevomer and palatines with broad bands of conical teeth (Ref. 559).

Biology     Glossary (e.g. epibenthic)

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Spawn in the calcareous deposits of colonies of the polychaeta, Salmacinasp. which makes them more of 'cavity spawners' than 'spawners in live vertebrate' (Ref. 34819, 26281).

Main reference Upload your references | References | Coordinator | Collaborators

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)

  Not Evaluated 

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FishSource |

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Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes(genus, species) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 0.9 - 11, mean 4.7 (based on 411 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.6289   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00493 - 0.02437), b=3.06 (2.86 - 3.26), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  4.3   ±0.4 se; based on diet studies.
Resilience (Ref. 120179):  Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (33 of 100).