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Koi is an informal name for the colored variants of carp kept for ornamental purposes. There are many varieties of ornamental koi, originating from breeding that began in Niigata, Japan in the early 19th century. [1] [2] [3] Several varieties are recognized by Japanese breeders and owners, distinguished by coloration, patterning, and scalation.
An Akamuji with white patches on the tips of its fins is called an Aka Hajiro (赤羽白). Shiromuji (白無字) A Shiromuji is a plain white fish. This variety occur normally as part of the breeding of Kōhaku and is not valued in Japan. A similar fish, but with metallic scales Platinum koi (プラチナ鯉, Purachina-goi) are very popular.
Koi ponds or lakes are a traditional feature of Japanese gardens, but many hobbyists use special ponds in small locations, with no attempt to suggest a natural landscape feature. The architecture of the koi pond can have a great effect on the health and well being of the koi. The practice of keeping koi often revolves around "finishing" a koi ...
Fish farming. A fish farm on the coast of Euboea island, in South Euboean Gulf, Greece. Fish farming or pisciculture involves commercial breeding of fish, most often for food, in fish tanks or artificial enclosures such as fish ponds. It is a particular type of aquaculture, which is the controlled cultivation and harvesting of aquatic animals ...
Selective breeding of carp into today's popular and completely domesticated koi and fancy goldfish began over 2,000 years ago in Japan and China, respectively. The Chinese brought goldfish indoors during the Song dynasty to enjoy them in large ceramic vessels.
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). In July 1977, the then Crown Prince Akihito visited the Saitama Prefectural Fisheries Experiment ...
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]
Fish reproduction. A pair of bettas spawning under a bubble nest. Fish reproductive organs include testes and ovaries. In most species, gonads are paired organs of similar size, which can be partially or totally fused. [ 1 ] There may also be a range of secondary organs that increase reproductive fitness.
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