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Several koi swim around in a pond in Japan. (video) A school of koi containing multiple different varieties Koi (鯉, English: / ˈ k ɔɪ /, Japanese:), or more specifically nishikigoi (錦鯉, Japanese: [ɲiɕi̥kiꜜɡoi], literally "brocaded carp"), are colored varieties of carp (Cyprinus sp.) that are kept for decorative purposes in outdoor koi ponds or water gardens.
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.
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 ...
Breeding programs help preserve species that have become rare or extinct in the wild, most notably the Lake Victoria cichlids. Some species have also become important as laboratory animals. Cichlids, poecilids and zebra danios are especially important for studies on learning, mating, and social behavior. Hobbyists also keep and observe many ...
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.
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 ...
Bubble nests, also called foam nests, are created by some fish and frog species as floating masses of bubbles blown with an oral secretion, saliva bubbles, and occasionally aquatic plants. Fish that build and guard bubble nests are known as aphrophils. [1] Aphrophils include gouramis (including Betta species) and the synbranchid eel Monopterus ...
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]