''Polydactylus'' is a genus of

threadfin Threadfins are silvery grey fish of the family Polynemidae, taxonomically considered a type of flatfish. Found in tropical to subtropical waters throughout the world, the threadfin family contains eight genera and about 40 species. An unrelated s ...

that mainly are native to the Indian, Atlantic and Pacific Oceans, especially in coastal or

brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...

waters (such as

mangrove A mangrove is a shrub or tree that grows mainly in coastal saline water, saline or brackish water. Mangroves grow in an equatorial climate, typically along coastlines and tidal rivers. They have particular adaptations to take in extra oxygen a ...

estuaries An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environm ...

). Some may even enter rivers and a single, ''P. macrophthalmus'', is a freshwater fish from rivers in

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

. Most species do not surpass in

standard length Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is ...

, but two can reach up to .

Species

There are currently 21 species in the genus: *'' Polydactylus approximans'' (

Lay Lay or LAY may refer to: Places *Lay Range, a subrange of mountains in British Columbia, Canada * Lay, Loire, a French commune *Lay (river), France * Lay, Iran, a village * Lay, Kansas, United States, an unincorporated community * Lay Dam, Alaba ...

& Bennett, 1839) (Blue bobo) *'' Polydactylus bifurcus'' Motomura,

Kimura Kimura (written: or lit. "tree village") is the 17th most common Japanese surname. Notable people with the surname *, Japanese novelist *, Japanese footballer *, Japanese botanist *, Japanese idol and singer *, Japanese footballer *, Japanese s ...

& Iwatsuki, 2001 (Slender fivefinger threadfin) *'' Polydactylus longipes'' Motomura, Okamoto & Iwatsuki, 2001 (Long-limb threadfin) *'' Polydactylus luparensis'' Lim, Motomura & Gambang, 2010 (Sarawak giant threadfin) *'' Polydactylus macrochir'' ( Günther, 1867) (King threadfin) *'' Polydactylus macrophthalmus'' ( Bleeker, 1858) (River threadfin) *'' Polydactylus malagasyensis'' Motomura & Iwatsuki, 2001 (African blackspot threadfin) *'' Polydactylus microstomus'' ( Bleeker, 1851) (Smallmouth threadfin) *''

Polydactylus mullani ''Polydactylus'' is a genus of threadfin that mainly are native to the Indian, Atlantic and Pacific Oceans, especially in coastal or brackish waters (such as mangrove or estuaries). Some may even enter rivers and a single, ''P. macrophthalmus'', ...

'' (Hora, 1926) (Arabian blackspot threadfin) *'' Polydactylus multiradiatus'' ( Günther, 1860) (Australian threadfin) *'' Polydactylus nigripinnis''

Munro A Munro (; ) is defined as a mountain in Scotland with a height over , and which is on the Scottish Mountaineering Club (SMC) official list of Munros; there is no explicit topographical prominence requirement. The best known Munro is Ben Nevi ...

, 1964 (Blackfin threadfin) *'' Polydactylus octonemus'' ( Girard, 1858) (Atlantic threadfin) *'' Polydactylus oligodon'' ( Günther, 1860) (Littlescale threadfin) *'' Polydactylus opercularis'' Seale &

Bean A bean is the seed of some plants in the legume family (Fabaceae) used as a vegetable for human consumption or animal feed. The seeds are often preserved through drying (a ''pulse''), but fresh beans are also sold. Dried beans are traditi ...

, 1907 (Yellow bobo) *'' Polydactylus persicus'' Motomura & Iwatsuki, 2001 (Persian blackspot threadfin) *''

Polydactylus plebeius ''Polydactylus plebeius'', the striped threadfin, also known as the common threadfin, Northern threadfin or puttynose, is a species of marine fish native to the Indo-Pacific. Description ''Polydactylus plebeius'' is a medium-sized threadfin whic ...

'' (

Broussonet Pierre Marie Auguste Broussonet (28 February 1761 – 17 January 1807) was a French naturalist who contributed primarily to botany. He was born in Montpellier, where he was educated, and travelled to Morocco, Spain, the Canary Islands, and Souther ...

, 1782) (Striped threadfin) *'' Polydactylus quadrifilis'' (

Cuvier Jean Léopold Nicolas Frédéric, baron Cuvier (23 August 1769 – 13 May 1832), known as Georges Cuvier (; ), was a French natural history, naturalist and zoology, zoologist, sometimes referred to as the "founding father of paleontology". Cuv ...

, 1829) (Giant African threadfin) *''

Polydactylus sexfilis ''Polydactylus sexfilis'', the six-finger threadfin or yellowthread threadfin, is a species of marine ray-finned fish, a threadfin from the family Polynemidae which is found in the Indian and Pacific Oceans. Description ''Polydactylus sexfilis ...

'' (

Valenciennes Valenciennes (, also , , ; ; or ; ) is a communes of France, commune in the Nord (French department), Nord Departments of France, department, Hauts-de-France, France. It lies on the Scheldt () river. Although the city and region experienced ...

, 1831) (Sixfinger threadfin) *'' Polydactylus sextarius'' (

Bloch Bloch is a surname of German origin. Notable people with this surname include: A *Adele Bloch-Bauer (1881–1925), Austrian entrepreneur *Albert Bloch (1882–1961), American painter *Alexandre Bloch (1857–1919), French painter *Alfred Bloch ( ...

& Schneider, 1801) (Blackspot threadfin) *'' Polydactylus siamensis'' Motomura, Iwatsuki & Yoshino, 2001 (Largemouth striped threadfin) *''

Polydactylus virginicus ''Polydactylus'' is a genus of threadfin that mainly are native to the Indian, Atlantic and Pacific Oceans, especially in coastal or brackish waters (such as mangrove or estuaries). Some may even enter rivers and a single, ''P. macrophthalmus'', ...

'' (

Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...

1758 Events January–March * January 1 – Swedish biologist Carl Linnaeus (Carl von Linné) publishes in Stockholm the first volume (''Animalia'') of the 10th edition of ''Systema Naturae'', the starting point of modern zoologic ...

) (Barbu)

References

{{Carangiformes-stub