Cyprinus rubrofuscus

Cyprinus rubrofuscus, the Amur carp, is a species of cyprinid fish, and is the wild form of the well-known koi. It is widespread in the fresh waters of eastern Asia, native to China, Korea, Russia, Vietnam and Laos from the Amur to Red River basins, and has also been introduced outside its native range.^[1] It is known for its muddy flavor and boniness, hence, it is not commonly eaten by locals except when stewed.^[2]

Cyprinus rubrofuscus
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cypriniformes
Family:	Cyprinidae
Genus:	Cyprinus
Species:	C. rubrofuscus
Binomial name
Cyprinus rubrofuscus Lacépède, 1803
Synonyms[1]
Cyprinus carpio haematopterus Temminck & Schlegel, 1846 Cyprinus viridiviolaceus Lacépède, 1803

In the past, it was considered a subspecies of the common (or European) carp, often under the scientific name C. carpio haematopterus (a synonym), but the two differ in genetics^[3][4] and meristics, leading recent authorities to recognize them as separate species.^[1][2] Although earlier studies also have found minor differences between northern ("haematopterus") and southern ("viridiviolaceus") populations in Eastern Asia in both meristics^[5] and genetics,^[3] later studies have found that they are not monophyletic.^[6] However, any phylogenetic structure is difficult to establish because of widespread translocations of carp between different regions.^[6] The parent species of the domesticated koi carp is an East Asian carp, possibly C. rubrofuscus (not C. carpio).^[7][8]