East Asian fourfinger threadfin (Eleutheronema rhadinum) fish species and information / pictures of East Asian fourfinger threadfin - Eleutheronema rhadinum

East Asian fourfinger threadfin (Eleutheronema rhadinum) fish species information

Scientific Name
Eleutheronema rhadinum

Common Name
East Asian fourfinger threadfin

Biology
Dorsal spines (total): 9; Dorsal soft rays (total): 13-15; Anal spines: 3; Anal soft rays: 14 - 16. Pectoral filaments 4; fin membranes black. Vomer with deciduous tooth plates on both sides. Posterior part of maxilla deep, 3% of SL. Short tooth plate extension onto lateral surface of lower jaw, 8-9% SL (Ref. 41639).

Classification

Classified By

Jordan & Evermann, 1902

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Threadfins (Polynemidae)

Distribution

Region

Northwest Pacific

Distribution

Northwest Pacific: China, Japan and Viet Nam. Not reported from the vicinity of oceanic islands.

Range

42°N - 15°N, 105°E - 142°E

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

5 m

Depth To - meters

8 m

Zone

pelagic-neritic

Environment

Marine; brackish; pelagic-neritic; depth range 5 - 8 m (Ref. 41639)

Trophic Level

3.82 s.e. 0.63 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

True

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

73.9 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.6250 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Moderate to high vulnerability (46 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

  Harmless

IUCN Red List Status

  Not Evaluated