Myxini (Kieferlose) (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); okinoseanus: -anus, Latin adjectival suffix that means, when attached to a name, “belonging to”: Okinose, Honshu Island, Japan, type locality (See ETYFish).
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
seewasser bathydemersal; standorttreu; tiefenbereich 300 - 1020 m (Ref. 31545). Deep-water
Northwest Pacific: Taiwan (Ref. 5193) and southern Japan.
Größe / Gewicht / Alter
Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 80.0 cm TL Männchen/unbestimmt; (Ref. 559)
Gill pouches and gill apertures 8, with the latter arranged in a straight line, loosely spaced (Ref. 31545). Fused cusps 3/2, total cusps 44-49. Total slime pores 87-97. Eyespots present. Ventral finfold well developed. Caudal finfold well developed only from the tip of the tail dorsally to above origin of cloaca (Ref. 51420).
Body shape (shape guide): eel-like.
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
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 ).
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 Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: kommerzielles potential
Tools
Zusatzinformationen
Download XML
Internet Quellen
Schätzungen auf der Grundlage von Modellen
Bevorzugte Temperatur (Ref.
123201): 7.3 - 13.6, mean 9.1 °C (based on 27 cells).
Phylogenetischer Diversitätsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00094 - 0.00444), b=2.92 (2.72 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophische Ebene (Ref.
69278): 4.3 ±0.7 se; based on size and trophs of closest relatives
Widerstandsfähigkeit (Ref.
120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (Fec assumed to be <100).
Anfälligkeit der Fischerei (Ref.
59153): Moderate to high vulnerability (52 of 100).
🛈