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The Amur carp is a hardy fish, and koi retain that durability. Koi are coldwater fish, but benefit from being kept in the 15–25 °C (59–77 °F) range, and do not react well to long, cold, winter temperatures; their immune systems are very weak below 10 °C (50 °F).
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]
Cyprinidae is a family of freshwater fish commonly called the carp or minnow family, including the carps, the true minnows, and their relatives the barbs and barbels, among others. Cyprinidae is the largest and most diverse fish family, and the largest vertebrate animal family overall, with about 3,000 species ; only 1,270 of these remain ...
Common carp by Alexander Francis Lydon. The type subspecies is Cyprinus carpio carpio, native to much of Europe (notably the Danube and Volga rivers). [2] [4]The subspecies Cyprinus carpio haematopterus (Amur carp), native to eastern Asia, was recognized in the past, [4] but recent authorities treat it as a separate species under the name Cyprinus rubrofuscus.
To many people, Koi fish strongly represent Samurai warriors, as they are able to be seen swimming upwards against a rivers current, symbolizing a Samurai's bravery. One typical saying is the phrase "koi no taki-nobori", translating to "Carp climbing the waterfalls", a phrase that is used to describe a persons strength and perseverance. [68]
Asian carp is an informal grouping of several species of cyprinid freshwater fishes native to Eurasia, commonly referring to the four East Asian species silver carp, bighead carp, grass carp (a.k.a. white amur) and black carp (a.k.a. black amur), [note 1] which were introduced to North America during the 1970s and now regarded as invasive in the United States.
The koi (from Japanese nishikigoi, 錦鯉) are well-known carp breeds, selectively bred for being enjoyed by spectators from above. Strictly speaking, koi is simply the Japanese name of the East Asian carp. The other species of typical carp are generally found in more restricted areas of eastern Asia, centered on the Yunnan region.
Japanese koi carp are coldwater fish. The term coldwater fish can have different meanings in different contexts.. In the context of fishkeeping, it refers to ornamental fish species that tolerate the temperatures of a typical indoor aquarium well and do not require a heater to remain active, as opposed to tropical fish whom need a heater to survive in the room temperatures of temperate climates;