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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 ...
Size Remarks 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. ...
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 plebeius is a medium-sized threadfin which attains a maximum total length of 45 centimetres (18 in) but is more commonly 30 centimetres (12 in). [1] It has a pointed snout and the dorsal profile of the head is nearly straight.
Eleutheronema tetradactylum has two dorsal fins; the first has 9 spines and the second has 13–15 soft rays, with 13 being the mean.The anal fin has 3 spines and 14–19 soft rays.
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]
Like other rainbowfish, this species shows sexual dimorphism. Breeding takes place year round and the male and female fish form pairs in which the females releases the eggs and the male fertilises them. 60-70 eggs are laid at each spawning and the golden coloured, round eggs attach to submerged vegetation with an adhesive filament.
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