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It grows up to 5 cm (2.0 in) in length, but this does not include the Threadfin's long tail. Sexing is easy by examining fins: males have larger, gaudier finnage than females. Males also have more intense colours. [2] When reproduction takes place eggs are scattered among the leaves of submerged vegetation, and hatch after 7–10 days. [3]
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 ...
This species is a protandrous hermaphrodite and Australian studies found that they were males at fork length of 24–47 centimetres (9.4–18.5 in), hermaphrodites at fork lengths between 25–46 centimetres (9.8–18.1 in) FL and females are found at fork lengths of 28–72 centimetres (11–28 in).
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 ...
Also known as golden wrasse, golden rainbowfish, and canary wrasse; scientific name halichoeres chrysus. Maximum length: 5.5 inches Wild habitat: Australia, Indonesia.
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]
These fishes vary in size from the redfin dwarf monocle bream (Parascolopsis boesemani), with a maximum published standard length of 17 cm (6.7 in), to the monogrammed monocle bream (Scolopsis monogramma) which has a maximum published total length of 38 cm (15 in).
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]