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, is a freshwater fish from rivers in Borneo.
Most species do not surpass in standard length, but two can reach up to .
Species
There are currently 21 species in the genus:
- Polydactylus approximans <small>(Lay & Bennett, 1839)</small> (Blue bobo)
- Polydactylus longipes <small>Motomura, Okamoto & Iwatsuki, 2001</small> (Long-limb threadfin)
- Polydactylus luparensis <small>Lim, Motomura & Gambang, 2010</small> (Sarawak giant threadfin)
- Polydactylus macrochir <small>(Günther, 1867)</small> (King threadfin)
- Polydactylus macrophthalmus <small>(Bleeker, 1858)</small> (River threadfin)
- Polydactylus malagasyensis <small>Motomura & Iwatsuki, 2001</small> (African blackspot threadfin)
- Polydactylus microstomus <small>(Bleeker, 1851)</small> (Smallmouth threadfin)
- Polydactylus mullani <small>(Hora, 1926)</small> (Arabian blackspot threadfin)
- Polydactylus multiradiatus <small>(Günther, 1860)</small> (Australian threadfin)
- Polydactylus nigripinnis <small>Munro, 1964</small> (Blackfin threadfin)
- Polydactylus octonemus <small>(Girard, 1858)</small> (Atlantic threadfin)
- Polydactylus oligodon <small>(Günther, 1860)</small> (Littlescale threadfin)
- Polydactylus opercularis <small>Seale & Bean, 1907</small> (Yellow bobo)
- Polydactylus persicus <small>Motomura & Iwatsuki, 2001</small> (Persian blackspot threadfin)
- Polydactylus quadrifilis <small>(Cuvier, 1829)</small> (Giant African threadfin)
- Polydactylus sextarius <small>(Bloch & Schneider, 1801)</small> (Blackspot threadfin)
- Polydactylus virginicus <small>(Linnaeus, 1758)</small> (Barbu)
The following fossil species are also known:
References