Koi fish belongs to CYPRINIDAE in biology, and there are more than 3,700 species of CYPRINIDAE in the world. It is a kind of advanced ornamental fish popular in the world today. It has the reputation of "living gem in water" and "swimming art".
Koi fish has a strong physique, bright colors, changeable patterns and beautiful swimming posture, which is of great ornamental and breeding value. Its body length can reach 1- 1.5 meters. Koi fish is distinguished by different colors, patterns and fish scales. Among them, koi fish, a butterfly, was successfully cultivated in 1980s. It is famous for its long and smooth fins. It is actually a hybrid between koi fish and Asian carp.
Koi fish has one or three colors of white, yellow, orange, red and blue, and the colors are dull or shiny. Although the patterns vary endlessly, the best patterns are dots on the top of the head and stepped stones on the back.
Koi fish is the largest producer in Japan, with the most mature breeding technology and equipment, and a large number of high-quality and pure koi fish, which are sought after by lovers all over the world.
Besides the water temperature and the richness of food will affect the growth rate of koi fish, the growth of female and male fish is also very different. Koi fish's dating, measuring the number of scales rings, means koi fish's age.