Eptatretus hexatrema

Eptatretus hexatrema, the sixgill hagfish or snotslang, is a species of marine fish in the hagfish family (family Myxinidae) of order Myxiniformes. It is native to the South Atlantic Ocean and southwestern Indian Ocean.

Eptatretus hexatrema
Off Duiker Island, South Africa
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: Myxini
Order: Myxiniformes
Family: Myxinidae
Genus: Eptatretus
Species:
E. hexatrema
Binomial name
Eptatretus hexatrema
(Müller, 1836)
Synonyms[1][2]
  • Bdellostoma hexatrema Müller 1836
  • Heptatretus hexatremus (Müller 1836)
  • Hexatrema hexatremum (Müller 1836)
  • Bdellostoma heterotremum Müller 1836
  • Heterotrema heterotremum (Müller 1836)

Distribution

Southeast Atlantic: known only from Walvis Bay, Namibia to Durban, South Africa[3]

Description

Maximum recorded length 80.0 cm. Depth of body 15 times total length. Six gill openings. Colour slaty grey. Egg cases ovoid about 30mm long by 12mm wide with anchor filaments at each end.[4] Eel shaped, with six barbels on the head around the mouth. Epatches form white spots under the skin. Two rows of slime pores under the body.[5] No paired fins, mouth has no jaws but has two protrusible rows of horny teeth.[6]

Habitat and behaviour

Non-migratory marine demersal. Depth range 10 – 400 m, usually found between 10 and 45 m. Commonly burrows in muddy bottoms. Feeds mostly by scavenging on dead or disabled fish. Secretes large quantities of slime when provoked.[6]

Importance to humans

No commercial value, considered a pest by fishermen.

Conservation status

Least concern

Name

Etymology: Eptatretus: Greek, epta = seven + Greek, tretos = with holes. hexatrema: ? .

Common names: sixgill hagfish, snotslang

Synonyms: Bdellostoma hexatrema Müller, 1836. Heptatretus hexatrema (Müller, 1836)[7]

References
  1. Froese, R.; Pauly, D. (2017). "Myxinidae". FishBase version (02/2017). Retrieved 18 May 2017.
  2. Van Der Laan, Richard; Eschmeyer, William N.; Fricke, Ronald (11 November 2014). "Family-group names of Recent fishes". Zootaxa. 3882 (1): 1–230. doi:10.11646/zootaxa.3882.1.1. PMID 25543675.
  3. Smith, Margaret M, and Heemstra, P. (eds.) 2003. Smith's sea fishes. South African Institute for Aquatic Biodiversity, Grahamstown. Struik publishers, Cape Town, 2003. ISBN 1 86872 890 0
  4. Barnard, K. H. A Monograph of the Marine Fishes of South Africa, Part 1. Annals of the South African Museum. Vol. 21. Cape Town: South African Museum. p. 16. ISBN 0-949940-10-0.
  5. Jones, Georgina. A field guide to the marine animals of the Cape Peninsula. SURG, Cape Town, 2008. ISBN 978-0-620-41639-9
  6. Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. (2010). Two Oceans: a guide to the marine life of southern Africa Struik Nature, Cape Town. ISBN 978 1 77007 772 0
  7. Bailly, N. (2013). Eptatretus hexatrema (Müller, 1836). In: Froese, R. and D. Pauly. Editors. (2013) FishBase. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=221466 on 2014-03-19

Froese, Rainer; Pauly, Daniel (eds.) (2014). "Eptatretus hexatrema" in FishBase. March 2014 version.

"Eptatretus hexatrema". Integrated Taxonomic Information System. 19 March 2014.

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