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King threadfin (Polydactylus macrochir) fish species and information / pictures of King threadfin - Polydactylus macrochir

King threadfin (Polydactylus macrochir) fish species information

Scientific Name
Polydactylus macrochir

Common Name
King threadfin

Biology
Body without spots nor stripes. Pectoral fin rays unbranched; 4th pectoral filament long, 40-53% of SL. Second spine of dorsal fin more robust than the rest. Posterior margin of maxilla extending considerably beyond level of posterior margin of adipose eyelid. Lower tip of 7th proximal pterygiophore of 1st dorsal fin directed backward. Lateral squamation on caudal fin unbranched (Ref. 40970).

Classification

Classified By

G?nther, 1867

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Threadfins (Polynemidae)

Distribution

Region

Indo-West Pacific

Distribution

Indo-West Pacific: southern New Guinea and northern Australia.

Range

5°S - 28°S, 121°E - 154°E

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

6 m

Zone

demersal

Environment

Marine; freshwater; brackish; demersal; catadromous (Ref. 51243); depth range 0 - 6 m (Ref. 57343)

Trophic Level

3.97 s.e. 0.67 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

True

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

170 cm

Common Length

48.0 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; gamefish: yes

Vulnerability

High to very high vulnerability (67 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (tmax=20)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated