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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 ...
Eleutheronema tetradactylum, the fourfinger threadfin, ... (6.6 ft), although 50 centimetres (20 in) is a more normal size. [2] Distribution
2 peppermint angelfish in blue water These delightful little angelfish are highly prized as aquarium fish, with an exorbitant price tag beyond the realms of most aquarists. A single fish has sold ...
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 ...
Monotrysian: Primitive groups have a single genital aperture near the end of the abdomen through which both copulation and egg laying occur. This character is used to designate the Monotrysia. [7] Ditrysian: The remaining groups have an internal duct that carry sperm and form the Ditrysia, with separate openings for copulation and egg laying. [7]
The paradise threadfin is a medium-sized species of threadfin which attains a maximum length of 30 centimetres (12 in), although the type of measurement used was not given, a more normal length is a total length of 17 centimetres (6.7 in). [2] It has a pointed snout and the head's dorsal profile is almost horizontal.
Parascolopsis capitinis has a moderately deep body which has a standard length which is 2.7 to 3 times longer than its depth. It has a continuous, incised dorsal fin supported by 10 spines and 9 soft rays.