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In Japan, koi releases are sometimes held as an event for tourism purposes. However, as koi is artificial breed, this causes genetic pollution by breeding with native carps. [68] Koi greatly increase the turbidity of the water because they are constantly stirring up the substrate. This makes waterways unattractive, reduces the abundance of ...
Yellow-white Butterfly Koi A butterfly koi, viewed from above. Butterfly koi, longfin koi, or dragon carp are a type of ornamental fish notable for their elongated finnage. The fish are a breed of the common carp, Cyprinus carpio, which includes numerous wild carp races as well as domesticated koi (nishikigoi).
Kōhaku (紅白 (kōhaku, "red and white")) is a variety of ornamental koi . The Kōhaku has a white body, with red markings across the body. It is considered one of the ‘Big Three’ varieties of Koi, along with the Sanke, and Showa. [1] The Kōhaku breed is believed to be one of the first ornamental carp varieties developed.
The breeders rear the fish in large cages floating in the water. [25] The fish are living in natural water but are isolated with a net. Because the only barrier separating the fish from the surrounding environment is a net, this allows the water to flow from the ‘natural’ surrounding through the fish farms.
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]
Showa is a variety of ornamental koi . The Showa is also known as the Showa Sanshoku (昭和三色). The Showa has a black (sumi) body, with red (hi) and white (shiro) markings across the body. The Showa is one of the gosanke; the ‘Big Three’, consisting of Kohaku, Sanke, and Showa.
[citation needed] Some of the most popular cyprinids among aquarists, other than goldfish and koi, include the cherry barb, Harlequin rasbora, pearl danios, rainbow sharks, tiger barbs, and the White Cloud Mountain minnow. One particular species of these small and undemanding danionines is the zebrafish (Danio rerio).
Izhak Kroshinsky, a leading American Ranchu goldfish breeder and co-author of the book The Fancy Goldfish: A Complete Guide to Care and Collecting (Chapter 10, Breeding Ranchus, page 171) wrote: "Some manufacturers of pellet foods claim to incorporate headgrowth enhancers. I have used Hikari's lionhead pellets, and they do seem to accelerate ...