Synaphobranchus affinis 

Scope: Global
Language: English

Translate page into:

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Anguilliformes Synaphobranchidae

Scientific Name: Synaphobranchus affinis Günther, 1877
Regional Assessments:
Common Name(s):
English Grey Cutthroat Eel, Gilbert's Synaphobranchid Eel
Synaphobranchus brachysomus Gilbert, 1905
Synaphobranchus taketae Tanaka, 1916
Taxonomic Source(s): Eschmeyer, W.N. (ed.). 2015. Catalog of Fishes. Updated 3 February 2015. Available at: (Accessed: 5 February 2015).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2009-02-04
Assessor(s): Smith, D. & Gordon, J.D.M.
Reviewer(s): Collen, B., Richman, N., Beresford, A., Chenery, A. & Ram, M.
Contributor(s): De Silva, R., Milligan, H., Lutz, M., Batchelor, A., Jopling, B., Kemp, K., Lewis, S., Lintott, P., Sears, J., Wilson, P., Smith, J. & Livingston, F.
Due to the deepwater nature and circumglobal distribution of this species, Synaphobranchus affinis is unlikely to be impacted by any major threatening process across its range, and consequently an assessment of Least Concern has been made.

The Grey Cutthroat Eel, Synaphobranchus affinis, has been assessed as Least Concern. This species has a circumglobal distribution. There is no directed fishery for this species

Geographic Range [top]

Range Description:The Grey Cutthroat Eel, Synaphobranchus affinis, is found in all oceans. In the eastern Atlantic this species is distributed from Liberia to South Africa, and in the western Atlantic this species is known from Cuba and Trinidad and Tobago. In the Indian Ocean it has been recorded from Madagascar, the Comoros and Reunion. In the Pacific, this species is known from Hawaii, Japan, Australia, Papua New Guinea, New Zealand and Chile.
Countries occurrence:
Angola; Anguilla; Antigua and Barbuda; Aruba; Australia; Bahamas; Benin; Cameroon; Chile; China; Comoros; Congo; Congo, The Democratic Republic of the; Côte d'Ivoire; Cuba; Dominica; Dominican Republic; Equatorial Guinea; Gabon; Ghana; Grenada; Guinea-Bissau; Haiti; Jamaica; Japan; Liberia; Madagascar; Martinique; Montserrat; New Zealand; Nigeria; Papua New Guinea; Réunion; Saint Kitts and Nevis; Saint Lucia; Saint Vincent and the Grenadines; South Africa; Taiwan, Province of China; Togo; Trinidad and Tobago; United States (Hawaiian Is.); Virgin Islands, British
FAO Marine Fishing Areas:
Atlantic – western central; Atlantic – southeast; Atlantic – eastern central; Indian Ocean – western; Indian Ocean – eastern; Pacific – southwest; Pacific – western central; Pacific – northwest; Pacific – eastern central; Pacific – southeast
Additional data:
Lower depth limit (metres):2400
Upper depth limit (metres):290
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is no population information available for this species.
Current Population Trend:Stable
Additional data:
Population severely fragmented:Unknown

Habitat and Ecology [top]

Habitat and Ecology:This bathydemersal species is found on the upper continental slope, at a depth range of 290-2,400 m. This species spends much of its time over rocky substrata.

Threats [top]

Major Threat(s): Due to the deepwater nature of this species it is unlikely that it is being impacted by any major threats. There is no directed fishery for this species. This species is not likely to be taken as by-catch in significant quantities as it most often found over rocky substrata at bathyl depths, a habitat that is not favourable for trawling.

Conservation Actions [top]

Conservation Actions: There are no species-specific conservation measures in place, or that are needed, for the Grey Cutthroat Eel.

Errata [top]

Errata reason: This errata assessment has been created because the map was accidentally left out of the version published previously.

Citation: Smith, D. & Gordon, J.D.M. 2010. Synaphobranchus affinis. (errata version published in 2017) The IUCN Red List of Threatened Species 2010: e.T154613A115213057. . Downloaded on 19 October 2017.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided