Polynemus

Polynemus is a genus of threadfins (family Polynemidae).[2][3][4] They are native to South and Southeast Asia and, depending on the species, occur in freshwater, brackish, and/or marine environments.[3]

Polynemus
Polynemus multifilis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Perciformes
Family:	Polynemidae
Genus:	Polynemus Linnaeus, 1758
Type species
Polynemus paradiseus Linnaeus, 1758[1]

The family Polynemidae is characterized by the pectoral fin that is divided into two sections; the upper one with rays that are attached whereas the lower rays are long and unattached ("threads"). In Polynemus, the unattached rays number 14–15, in contrast to 3–7 in other genera.[4]

Species

There are eight recognized species in this genus:[2][3]

• Polynemus aquilonaris Motomura, 2003 (Northern paradise fish)
• Polynemus bidentatus Motomura & Tsukawaki, 2006
• Polynemus dubius Bleeker, 1854 (Eastern paradise fish)
• Polynemus hornadayi Myers, 1936 (Hornaday's paradise fish)
• Polynemus kapuasensis Motomura & van Oijen, 2003 (Kapuas elegant paradise fish)
• Polynemus melanochir Valenciennes, 1831 (Blackhand paradise fish)
  • Polynemus melanochir melanochir — Blackhand paradise fish
  • Polynemus melanochir dulcis — Lake blackhand paradise fish
• Polynemus multifilis Temminck & Schlegel, 1843 (Elegant paradise fish)
• Polynemus paradiseus Linnaeus, 1758 (Paradise threadfin)

References

1. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Polynemus". Catalog of Fishes. California Academy of Sciences. Retrieved 18 April 2020.
2. Froese, Rainer and Pauly, Daniel, eds. (2019). Species of Polynemus in FishBase. December 2019 version.
3. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Polynemus". Catalog of Fishes. California Academy of Sciences. Retrieved 18 April 2020.
4. Nelson, J. S. (2006). Fishes of the World (4 ed.). Hoboken, NJ: John Wiley & Sons. p. 372. ISBN 978-0-471-25031-9.