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Mixini (Missine) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: hepta (Gr.), seven; tretos (Gr.), perforated (i.e., with holes), referring to seven gill apertures on what would later be described as Homea banksii (=E. cirrhatus) [range within genus is 6-14 pairs of gill apertures]. (See ETYFish); strahani: In honor of Australian zoologist Ronald Strahan (1922-2010), for “important” contributions to the study of hagfishes. (See ETYFish).

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

marino batidemersale; non migratori; distribuzione batimetrica 189 - ? m (Ref. 26665). Tropical

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Western Central Pacific: Philippines and Australia; probably occurs along other western central Pacific islands.

Size / Peso / Age

Maturity: L_m ? range ? - ? cm
Max length : 62.0 cm TL maschio/sesso non determinato; (Ref. 85052); 52.0 cm TL (female)

Short description Chiavi di identificazione | Morfologia | Morfometria

Spine dorsali (totale) : 0; Raggi dorsali molli (totale) : 0; Spine anali: 0; Raggi anali molli: 0. Median fins without rays (Ref. 9841). Body brown. Eyespots absent. Gill pouches and apertures 7. Ventral finfold well developed. Fused cusps 3/3, total cusps 47-52. Total slime pores 76-80 (Ref. 51420).

Minimum depth from Ref. 58018.

Life cycle and mating behavior Maturities | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve

Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Ref. 51361 ).

Main reference Upload your references | Bibliografia | Coordinatore | Collaboratori

Fernholm, B., 1998. Hagfish systematics. p. 33-44. In J.M. Jørgensen, J.P. Lomholt, R.E. Weber and H. Malte (eds.) The biology of hagfishes. Chapman & Hall, London. 578 p. (Ref. 31276)

IUCN Red List Status (Ref. 130435)

Data deficient (DD) ; Date assessed: 11 November 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

Informazioni ulteriori

Trophic ecology
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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00204 (0.00092 - 0.00452), b=2.93 (2.73 - 3.13), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.2 ±0.7 se; based on size and trophs of closest relatives

Resilienza (Ref. 120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (45 of 100).

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Eptatretus strahani McMillan & Wisner, 1984