Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

Mixines (mixinos) (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); atami: Named for Atami, west coast of Sagami Bay, Japan, type locality. (See ETYFish).

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

marino batidemersal; no migratorio; rango de profundidad 300 - 536 m (Ref. 31276). Deep-water

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Northwest Pacific: Japan. Notoriously confused with other unnamed species around Japan (Ref. 31276).

Tamaño / Peso / Age

Maturity: L_m ? range ? - ? cm
Max length : 61.0 cm TL macho / no sexado; (Ref. 31276)

Short description Claves de identificación | Morfología | Morfometría

Gill pouches (GP) 6 pairs with gill apertures closely spaced in a fairly straight line; 1-2 GP at end of dental muscle. Ventral aorta splitting at about GP 5-6. Fused cusps 3/3. Total cusps 47-52. Prebranchial slime pores 12-19. Total pores 71-78. Eyespots faint or absent. Ventral finfold low to vestigial (Ref. 51420).

Attains over 50 cm TL (Ref. 559).

Life cycle and mating behavior Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva

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 | Referencias | Coordinador | Colaboradores

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: 13 November 2008

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Pesquerías: comercial

FAO - Publication: search | FishSource |

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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).

Nivel trófico (Ref. 69278): 4.5 ±0.80 se; based on food items.

Resiliencia (Ref. 120179): Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (44 of 100).

Price category (Ref. 80766): Low.

Eptatretus atami (Dean, 1904)