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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.
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 ...
Same thing goes for the "Dwarf neon rainbowfish" -- it's a Neon rainbowfish sans Dwarf. If no one objects, I'll fix them and list a few. As an aside, quoted sizes I will add to the lists are known sizes reported by rainbowfish hobbyists such as myself and won't even come close, in some respects, to what fishbase may have.
The Atlantic threadfin is a medium-sized species of threadfin which grows to a maximum total length of 30 centimetres (12 in), although most fish have a total length of around 25 centimetres (9.8 in). [2] It has a pointed snout and an almost straight dorsal profile on its head. [3]
The threadlike dorsal and anal fin tips are characteristic. The threadfin jack is a moderately large species, growing to a known maximum length of 60 cm. [7] The species is similar in appearance to a number of jacks in the genera Carangoides and Alectis in its adult form, having a compressed, oblong body, with the dorsal and ventral profiles approximately equal in concavity.
The giant African threadfin is, as its common name indicates, a large species of threadfin attaining a maximum total length of 200 centimetres (79 in), although the more common size is 150 centimetres (59 in). [2] It has a pointed snout and an almost straight dorsal profile on the head.