Brown hagfish (Eptatretus atami) fish species and information / pictures of Brown hagfish - Eptatretus atami

Brown hagfish (Eptatretus atami) fish species information

Scientific Name
Eptatretus atami

Common Name
Brown hagfish

Biology
Gill pouches 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.

Classification

Classified By

Dean, 1904

Class

Hagfishes (Myxini)

Order

Hagfishes (Myxiniformes)

Family

Hagfishes (Myxinidae)

Distribution

Region

Northwest Pacific

Distribution

Northwest Pacific: Japan. Notoriously confused with other unnamed species around Japan.

Range

Unknown

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

300 m

Depth To - meters

536 m

Zone

bathydemersal

Environment

Marine; bathydemersal; non-migratory; depth range 300 - 536 m

Trophic Level

4.5 s.e. 0.80 Based on food items.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

61.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial

Vulnerability

Moderate to high vulnerability (47 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated