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Synaphobranchus affinis Günther, 1877

Grey cutthroat
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Synaphobranchus affinis   AquaMaps   Data sources: GBIF OBIS
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Image of Synaphobranchus affinis (Grey cutthroat)
Synaphobranchus affinis
Picture by SFSA

Japan country information

Common names: Hora-anago
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Ranges from Hokkaido to the Kochi Prefecture (Ref. 559). Also Ref. 33390.
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

Grey cutthroat eel, Gilbert's synaphobranchid eel, Grey cut-throat eel, ... more

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

Teleostei (teleosts) > Anguilliformes (Eels and morays) > Synaphobranchidae (Cutthroat eels) > Synaphobranchinae
Etymology: Synaphobranchus: Greek, syn, symphysis = grown together + Greek, aphoo, aphiemi = to throw + Greek, brangchia = gill (Ref. 45335).
  More on author: Günther.

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

Marine; benthopelagic; depth range 290 - 2400 m (Ref. 50610), usually 400 - 500 m (Ref. 26999).   Deep-water; 3°C - 11°C (Ref. 26895); 44°N - 42°S

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

Circumglobal, except the northeast Pacific (Ref. 26895). Eastern Atlantic: Liberia to northern Angola (Ref. 5235).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 160 cm TL male/unsexed; (Ref. 26895)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 230. Dark grey in color (Ref. 3973). Anal rays about 230 (Ref. 3973).

Biology     Glossary (e.g. epibenthic)

Found on the upper continental slope (Ref. 50610, 75154), over rocky substrata (Ref. 58302).

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

Main reference Upload your references | References | Coordinator | Collaborators

Sulak, K.J. and Y.N. Shcherbachev, 1997. Zoogeography and systematics of six deep-living genera of synaphobranchid eels, with a key to taxa and description of two new species of Ilyophis. Bull. Mar. Sci. 60(3):1158-1194. (Ref. 26895)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 04 February 2009

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: of no interest
FAO(Publication : search) | FishSource |

More information

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Summary page | Point data | Common names | Photos

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 | National databases | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 7.1 - 13.2, mean 9.7 (based on 287 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00065 (0.00032 - 0.00129), b=3.15 (2.97 - 3.33), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  4.5   ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (Assuming fecundity > 100).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).