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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.
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.
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 ...
Tank size Temperature range pH range Water Hardness 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 ...
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 their school. If properly cared for, Rainbowfish can live up to 5 years in captivity. [5]
Lives in lakes, ponds and rivers. White bass do not like muddy water or areas with vegetation and prefer open water or rocky parts. White bass feed on small invertebrates like small crustaceans, midge larvae, and small species of fishes. White bass common length size is 12.5 inches but can grow up to 17 inches and more.
Nemipteridae has Nemipterus as its type genus and this name is a compound of nematos, meaning "thread", and pterus, which means "fin", and this is a reference to the filaments on the dorsal and caudal fin rays of the type species of Nemipterus, Dentex filamentosus.
Additionally 3191 fish species (21% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN. [ 2 ]