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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 beautiful fins, and is among the most attractive of the rainbowfishes.
This feature explains both the common name threadfin and the family name Polynemidae, from the Greek poly meaning "many" and nema meaning "filament." Similar species, such as the mullets (family Mugilidae ) and milkfish (family Chanidae ), can be easily distinguished from threadfins by their lack of filamentous pectoral rays .
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.
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.
Nemipterus threadfin breams are separated from other Nemipterids by sometimes having scales on the suborbital region and the suborbital bone's margin may be smooth, have small serrations or just a few denticulations. The rear edge of the preoperculum is either smooth or has fine denticulations. If canine-like teeth are present they are only in ...
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.
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 japonicus, the Japanese threadfin bream, is a species of marine ray-finned fish belonging to the family Nemipteridae, the threadfin and whiptail breams. This species is found in the Indo Pacific region and is an important food fish.