Eleutheronema tetradactylum

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Fourfinger threadfin
Eleutheronema tetradactylum Thomas.jpg
Eleutheronema tetradactylum
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Polynemidae
Genus: Eleutheronema
Species: E. tetradactylum
Binomial name
Eleutheronema tetradactylum
(Shaw, 1804)
  • Polydactylus rhadinus, Jordan & Evermann, 1902
  • Eleutheronema rhadinum, Jordan & Evermann, 1902

Eleutheronema tetradactylum, also known as fourfinger threadfin, Indian salmon, blue threadfin, or Rawas, is a threadfin fish of the Polynemidae family.[1] This is a commercially valuable species, known for uses in aquaculture.[1] It occurs mainly over shallow muddy bottoms in coastal waters,[2] often forming loose schools.[3] Adults of this species enter rivers during winter.[3] Adults feed on prawns, fish, and occasionally polychaetes,[4] while juveniles feed on prawns, shrimps, and mysids.[4] This species is vulnerable to overfishing.[5]


  1. ^ a b Motomura, H., Y. Iwatsuki, S. Kimura and T. Yoshino, Revision of the Indo-West Pacific polynemid fish genus Eleutheronema, 2002, p. 47-61, Reference 41639, FishBase; Retrieved: 2007-12-16
  2. ^ Kailola, P.J., M.J. Williams, P.C. Stewart, R.E. Reichelt, A. McNee and C. Grieve, Australian fisheries resources, 1993, p. 422, Reference 41639, FishBase; Retrieved: 2007-12-16
  3. ^ a b Menon, A.G.K. and M. Babun Rao, Polynemidae, 1984, Reference 6390, FishBase; Retrieved: 2007-12-16
  4. ^ a b Motomura, H., Threadfins of the world, 2004, p. 117, 57343, FishBase; Retrieved: 2007-12-16
  5. ^ Cheung, W.W.L., T.J. Pitcher and D.Pauly, A fuzzy logic expert system to estimate intrinsic extinction vulnerabilities of marine fishes to fishing. Biol. Conserv, 2005, p. 97-111, Reference 59153, FishBase; Retrieved: 2007-12-16