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Threadfin rainbowfish do well in aquariums of 20 US gallons (76 L), however 30 US gallons (110 L) is preferred. They are best housed in a "species only" tank; meaning that the tank is reserved for the Threadfins alone. Because of their tiny mouths, they can be difficult to feed.
Ranging in length from 11 cm (4.5 in) in the dwarf threadfin (Parapolynemus verekeri) to 2 m (6.6 ft) in fourfinger threadfin (Eleutheronema tetradactylum) and giant African threadfin (Polydactylus quadrifilis), threadfins are both important to commercial fisheries as a food fish, and popular among anglers. Their habit of forming large schools ...
Eleutheronema tetradactylum, the fourfinger threadfin, known as ranwas in India is a species of marine ray-finned fish, a threadfin from the family Polynemidae which occurs in the Indian and western Pacific Ocean.
Also known as golden wrasse, golden rainbowfish, and canary wrasse; scientific name halichoeres chrysus. Maximum length: 5.5 inches Wild habitat: Australia, Indonesia.
Bleher's rainbowfish: Chilatherina bleheri: 12 cm (4.7 in) Red rainbowfish: Glossolepis incisus: 9–13 cm (3.5–5.1 in) Almost all rainbowfish species are bred in captivity and wild populations may be protected. [66] Threadfin rainbowfish: Iriatherina werneri: 3–4 cm (1.2–1.6 in) New Guinea rainbowfish: Melanotaenia affinis: 13 cm (5.1 in)
Eleutheronema rhadinum (Jordan & Evermann, 1902) (East Asian fourfinger threadfin) Eleutheronema tetradactylum (Shaw, 1804) (Fourfinger threadfin) Eleutheronema tridactylum (Bleeker, 1849) (Threefinger threadfin)
Rainbowfish usually eat floating flakes in captivity, because in the wild they will often eat insects floating on the surface. In a home setting, these fish need well-oxygenated water with a pH level of 6.8 – 7.2, optimal temperatures varying between 72 and 82 °F (22 and 28 °C), and plenty of aquatic plants to give them hiding places amid ...
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). [ 2 ] [ 3 ] Some may even enter rivers and a single, P. macrophthalmus , is a freshwater fish from rivers in Borneo .