| Polynemus aquilonaris | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Polynemidae |
| Genus: | Polynemus |
| Species: | P. aquilonaris |
| Binomial name | |
| Polynemus aquilonaris Motomura, 2003 | |
Polynemus aquilonaris, commonly known as the northern paradise fish, is a fish of the threadfin family Polynemidae. It is native to the large rivers of mainland Southeast Asia.
Polynemus aquilonaris is a medium-sized species of threadfin which attains a maximum total length of 15.8 centimetres (6.2 in). [2] It has a pointed snout and a dorsal profile which is nearly straight. There are two separate dorsal fins, the first dorsal fin with 8 spines in which the bases of the spines have a similar thickness and the second dorsal fin has a single spine and 15 to 19 soft rays. The anal fin has 3 spines and 11 to 13 soft rays and it has a base that is shorter than the base of the second dorsal-fin base. The pectoral fin has 15 to 17 unbranched rays and has a length equivalent to 34 to 41% of the standard length with its tip falling just short of or reaching slightly beyond the origin of the anal fin. It has 7 pectoral filaments the shortest being the first which does not reach the tip of the pelvic fin and the longest extends well past the tips of the tail. The caudal fin is deeply forked, with long lobes neither of them being filamentous. The lateral line is simple, extends from the upper part of the gill slit to the tail. The head and body are greyish silver on the back and silver below. The front margin of the first dorsal fin and the rear margin of the second dorsal fin are blackish, they are otherwise translucent. The pectoral fins are also translucent. The bases of the pectoral filaments are white, becoming blackish on their tips, The pelvic fin is translucent with its base and its rear edge being white. The white anal fin has a translucent posterior margin with a similar pattern on the tail. [3]
Polynemus aquilonaris is found in south-east Asia in the countries of Thailand, Cambodia, Laos and Vietnam where it is found in the drainage basins of the Chao Phraya and Mekong including Tonle Sap and its associated rivers. [3]
Polynemus aquilonaris occurs where there are sandy or muddy bottoms in freshwater rivers and estuaries where it feeds on small crustaceans, small fishes, and benthic organisms. [2] This species has not been found to have any hermaphroditic phases and it is thought that it has separate sexes. [3]
Polynemus aquilonaris is esteemed as a food fish within its range. It is exported to Japan as an ornamental species. [3]
Polynemus aquilonaris was first formally described in 2003 by Hiroyuku Motomura from a specimen purchased at Samyan Fish Market which had been caught in the Chao Phraya. [4] It had previously been considered that the paradise fish in north of Malaya were populations of the Polynemus dubius but Motomura showed that they were a separate species. [5]
Threadfins are silvery grey perciform fish of the family Polynemidae. Found in tropical to subtropical waters throughout the world, the threadfin family contains eight genera and about 40 species. An unrelated species sometimes known by the name threadfin, Alectis indicus, is properly the Indian threadfish.
This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes.
The Atlantic threadfin is a species of ray-finned fish a threadfin from the family Polynemidae which is native to subtropical and temperate waters of the western Atlantic Ocean and the Gulf of Mexico.
Eleutheronema tetradactylum, the fourfinger threadfin, known as ranwas in Pakistan, is a species of marine ray-finned fish, a threadfin from the family Polynemidae which occurs in the Indian and western Pacific Ocean.
Nemipterus virgatus, the golden threadfin bream or yellowlipped threadfin bream, is a species of marine ray-finned fish belonging to the family Nemipteridae, the threadfin breams. This species is found in the Western Pacific Ocean.
The giant African threadfin is a species of ray-finned fish from the threadfin family Polynemidae. It is found in the eastern Atlantic Ocean off the west coast of Africa.
Polydactylus sexfilis, the six-finger threadfin or yellowthread threadfin, is a species of marine ray-finned fish, a threadfin from the family Polynemidae which is found in the Indian and Pacific Oceans.
The king threadfin, also known as the blind salmon, blink tassel-fish, burnett salmon, gold threadfin, king salmon, kingfish, Sheridan threadfin, triped tassel fish, or threadfin salmon, is a species of marine ray-finned fish, a threadfin from the family Polynemidae which is found in southern New Guinea and northern Australia.
The Indian threadfin is a species of marine ray-finned fish from the family Polynemidae, the threadfins. It is a coastal species from south-east Asia which has been recorded in Papua New Guinea.
Pterois brevipectoralis is a species of marine ray-finned fish belonging to the family Scorpaenidae, the scorpionfishes and lionfishes. This species is found in the Western Indian Ocean at a depth of 70 to 80 m.
Polynemus multifilis, the elegant paradise fish is a species of ray-finned fish, a threadfin from the family Polynemidae which is found in rivers in southeast Asia.
Polydactylus sextarius, the blackspot threadfin, is a species of marine ray-finned fish, a threadfin from the family Polynemidae which is native to the western Pacific and eastern Indian Oceans.
Polydactylus plebeius, the striped threadfin, also known as the common threadfin, Northern threadfin or puttynose, is a species of marine fish native to the Indo-Pacific.
Nemipterus tambuloides, the fivelined threadfin bream, is a species of marine ray-finned fish belonging to the family Nemipteridae, the threadfin breams. This fish is found in the Indo-Pacific region.
The yellowbelly threadfin bream is a species of marine ray-finned fish belonging to the family Nemipteridae, the threadfin and whiptail breams. This fish is found in the western Pacific Ocean.
The dwarf paradise fish, also known as the streamer threadfin or streamered tasselfish, is a species of ray-finned fish from a family Polynemidae, the threadfins. It is the only species in the genus Parapolynemus and it is found in Australia and New Guinea.
Polynemus is a genus of threadfins. They are native to South and Southeast Asia and, depending on the species, occur in freshwater, brackish, and/or marine environments.
The paradise threadfin is a species of catadromous ray-finned fish, a threadfin from the family Polynemidae which is found in south and southeast Asia in freshwater rivers where it is a valued food fish.
Filimanus is a genus of marine ray-finned fishes, threadfins from the family Polynemidae.
The royal threadfin is a species of ray-finned fish, a threadfin from the family Polynemidae, the threadfins. It is found in the eastern Atlantic Ocean along the western coast of Africa.
