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Icosteus aenigmaticus  Lockington, 1880

Ragfish
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| Native range | All suitable habitat | PointMap | Year 2100 |
This map was computer-generated and has not yet been reviewed.
Icosteus aenigmaticus   AquaMaps   Data sources: GBIF OBIS
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Image of Icosteus aenigmaticus (Ragfish)
Icosteus aenigmaticus
Picture by Van Orden, W.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Icosteidae (Ragfish)
Etymology: Icosteus: Greek, eikoo = to sag, to bend something that is soft + Greek, osteon = bone.

Environment / Climate / Range Ecology

Marine; bathypelagic; depth range 0 - 1420 m (Ref. 50550), usually 18 - 732 m (Ref. 2850).   Deep-water; 66°N - 32°N

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 213 cm TL male/unsexed; (Ref. 2850)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 52-55; Anal spines: 0; Anal soft rays: 34 - 40. Pectorals rounded, pedunculate (Ref. 6885). Generally of a chocolate color (Ref. 6885). Young more robust, with an expanded and rounded caudal fin, 5 pelvic rays, and a brown and yellow irregularly blotched with faint purple color, dusky on fins (Ref. 6885).

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

North Pacific: Japan to southeastern Alaska and to Point Loma, southern California, USA.

Biology     Glossary (e.g. epibenthic)

Adults occur near bottom; juveniles in shallow water or offshore near the surface (Ref. 50277). Feeds on jellyfish (Ref. 50277), fishes and squids (Ref. 2850), as well as octopuses (Ref. 4525).

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. Houghton Mifflin Company, Boston, U.S.A. 336 p. (Ref. 2850)

IUCN Red List Status (Ref. 90363)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 1.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic Level (Ref. 69278):  4.5   ±0.57 se; Based on food items.
Resilience (Ref. 69278):  Low, minimum population doubling time 4.5 - 14 years (K=0.13; Fec=293,000).
Vulnerability (Ref. 59153):  High to very high vulnerability (71 of 100) .
Price category (Ref. 80766):   Unknown.