The royal family in koi fish refers to red and white, Taisho, Tricolor, Showa and koi fish. The three schools are red and white, Dazheng, Showa and Bai.
There are differences in the appearance and style of Yu Sanjia, and the emphasis of appreciation is also different. There are many varieties in koi fish, among which red and white, Dazheng tricolor and Showa tricolor are very suitable for breeding, and red and white is the most representative variety. Taisho tricolor koi fish, the representative variety of koi fish, refers to the red, white and black tricolor koi fish cultivated by a carp teacher in Niigata, Japan. Because it appeared in the Taisho period, it was named Taisho Tricolor, and the ink spots were similar to the white spots distributed in the shoulders and other parts.