Polydactylus macrochir (Günther, 1867)
King threadfin
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Polydactylus macrochir
Picture by Lunow, C.
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Picture by Lunow, C.
Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Polynemidae (Threadfins)
Etymology: Polydactylus: Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335).
Etymology: Polydactylus: Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335).
Environment / Climate / Range Ecology
Marine; freshwater; brackish; demersal; catadromous (Ref. 51243); depth range 0 - 6 m (Ref. 57343). Tropical; 5°S - 28°S, 121°E - 154°E (Ref. 57343)
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 170 cm FL male/unsexed; (Ref. 6390); common length : 48.0 cm FL male/unsexed; (Ref. 9685); max. published weight: 45.0 kg (Ref. 9685); max. reported age: 20 years (Ref. 6390)
Max length : 170 cm FL male/unsexed; (Ref. 6390); common length : 48.0 cm FL male/unsexed; (Ref. 9685); max. published weight: 45.0 kg (Ref. 9685); max. reported age: 20 years (Ref. 6390)
Short description Morphology | Morphometrics
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).
Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri
Indo-West Pacific: southern New Guinea and northern Australia.
Found in shallow, turbid waters coastal waters, estuaries, mangrove creeks, and mangrove-lined rivers (Ref. 57343), over sandbanks and mud substrates (Ref. 6390). Usually forms loose schools, although larger fish are more often observed in pairs or singly (Ref. 6390). Feeds on prawns and fish. Protandrous hermaphrodites.
Main reference
Upload your references | References | Coordinator | Collaborators
Motomura, H., 2004. Threadfins of the world (Family Polynemidae). An annotated and illustrated catalogue of polynemid species known to date. FAO Spec. Cat. Fish. Purp. Rome: FAO. 3:117 p.
IUCN Red List Status (Ref. 90363)
Threat to humans
Harmless
Human uses
Fisheries: commercial; gamefish: yes
FAO(Publication : search) | FisheriesWiki | Sea Around Us
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Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
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Internet sources
BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00000 (0.00000 - 0.00000), b=0.00 (0.00 - 0.00), based on (Ref. 93245).
Trophic Level (Ref. 69278): 4.0 ±0.7 se; Based on diet studies.
Resilience (Ref. 69278): Low, minimum population doubling time 4.5 - 14 years (tmax=20).
Vulnerability (Ref. 59153): High to very high vulnerability (67 of 100) .