The original variety of koi is Cyprinus carpio. As an ornamental fish, the red carp was very popular in the Ming Dynasty. It is said that the koi originated from Longzhou koi in Guangxi, Xingguo red carp in Jiangxi, and Hangzhou gold carp in Zhejiang in China. It was introduced into Japan from China in the early stage. After long-term artificial breeding by the Japanese people, there are more than 100 varieties of koi. According to literature records, the Japanese nobles first raised the koi ...