Japanese sleeper ray (Narke japonica) fish species and information / pictures of Japanese sleeper ray - Narke japonica

Japanese sleeper ray (Narke japonica) fish species information

Scientific Name
Narke japonica

Common Name
Japanese sleeper ray

Biology
Occurs inshore and offshore (Ref. 9913, 11230). Found on sand, often near rocky reefs (Ref. 12951). Biology little known (Ref. 9913). Does not do well in aquariums (Ref. 12951).

Classification

Classified By

Temminck & Schlegel, 1850

Class

Sharks and Rays (Elasmobranchii)

Order

Electric rays (Torpediniformes)

Family

Sleeper rays (Narkidae)

Distribution

Region

Northwest Pacific

Distribution

Northwest Pacific: southern Japan to the South China Sea near Hong Kong.

Range

Unknown

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

12 m

Depth To - meters

23 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 12 - 23 m (Ref. 12951)

Trophic Level

3.5 s.e. 0.37 Based on food items.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

40.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.6252 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: minor commercial

Vulnerability

Low vulnerability (21 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity

Threat To Humans

Other (Ref. 10011)

IUCN Red List Status

Vulnerable (VU) (A2d+3d+4d)