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The threadfin rainbowfish or featherfin rainbowfish (Iriatherina werneri) is a rainbowfish, the only species in the genus Iriatherina. It is characterized by long ...
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.
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. ...
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 ...
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 ...
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.
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]
Nemipterus randalli occurs over open sandy and muddy substrates at depths of 20–200 m in its native range but in the Mediterranean it is caught mainly at 30–80 m. [5] It feeds mainly on small benthic invertebrates such as polychaetes , crustaceans , cephalopods and molluscs) and small fishes.