Cyprinus carpio

Koi (Cyprinus carpio haematopterus) is a kind of high-grade ornamental fish popular in the world today, and has the reputation of "living gems in the water" and "art that can swim".

Koi is an omnivorous fish. It can be eaten by mollusks, fragments of higher aquatic plants, benthic animals and even fine algae or synthetic pellets. Koi is gentle, likes to swim in groups, easy to raise, and has strong adaptability to water temperature. It can live in 5-30℃ water temperature environment, and the growth water temperature is 21-27℃.  

In addition to the water temperature and the abundance of food can affect the growth rate of koi, the growth of female and male fish is also very different. The age determination of koi is the same as that of most fish, and the number of rings of scales is determined to indicate the age of koi.

The division of koi species is mainly divided into several large strains according to the different colors and different carp species produced during their development. Due to the relatively short history of koi development, the offspring produced by it are not genetically stable like other animals, and can only be divided from large strains. The main varieties are: Taisho tri-color, Showa tri-color, red and white, pine leaf gold, golden pine leaf, silver pine leaf, German gold, German mountain blow, German rat gold, German white gold, German orange gold, arhat, silver arhat, German black carp and so on.

Carp in addition to ornamental, can also be eaten, can also be used as medicine to treat diseases, has the spleen and stomach opening, relieving urine, relieving edema, relieving cough and relieving asthma and hair milk effect; Meat can treat portal vein cirrhosis, chronic nephritis, cough, asthma, maternal lack of milk, women with irregular menstruation or blood avalanche and other diseases; Blood can treat mouth and eye skew; Bile can treat red eye pain and swelling and suppurative otitis media.

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Widely distributed in China, Russia, Europe, Korea, Japan.

Koi has high ornamental and breeding value because of its beautiful physique, colorful color, varied patterns and masculine swimming posture. Its body length can reach 1-1.5 meters. Koi are distinguished by different colors, patterns and scales. The butterfly koi, which was only developed in the 1980s and is known for its long, smooth fins, is actually a cross between a koi and an Asian carp, and is not a true koi.
The color of koi includes one to several colors, including: white, yellow, orange, red, black, and blue (a light gray shadow due to the black under the scale of the fish), the color is dull or glossy. Although there are endless variations of patterns, the best ones are the small circular spots on the top of the head and the stepped stone-like pattern on the back. Fish scales may or may not be present; Large or small; Or wrinkled, like a "diamond."