The main varieties of koi fish include the following:
Kohaku Koi: This is the most common variety among koi fish. Its body surface is as white as snow, and the red patterns are ever - changing. In high - quality Kohaku koi, the red spots are evenly distributed with neat edges. It has high ornamental value and symbolizes good luck, wealth, and success.

Taisho Sanshoku Koi: This type of koi has red and black patterns on its body. There are only red spots on the head, and black stripes on the pectoral fins. The color contrast is strong. Due to its low production rate and high selection and elimination rate, it is particularly precious.
Showa Sanshoku Koi: This kind of koi is interwoven with three colors: red, black, and white. The black color should be thick and lustrous. Only when the red color and the body shape meet the standards can it be considered a real high - quality product. The color combination of Showa Sanshoku is magnificent and vigorous, with extremely high ornamental value.
Ogon Koi: The whole body of the Ogon koi is golden yellow, and the tips of its scales are shiny. It symbolizes good luck, prosperity, and longevity. Ogon koi is not only beautiful but also implies wealth and affluence.
Tancho Koi: The most attractive feature of this koi is the red patch on its head. The larger the red spot, the better. The top - grade Tancho koi has a red spot that is centered, bright, and shiny. Tancho koi symbolizes good luck and is believed to bring prosperity to one's career and good official fortune in feng shui.
Utsurimono Koi: It is famous for its two - color patterns. When it swims, it looks like a flowing ink - wash painting, which has high ornamental value. The patterns and colors of Utsurimono koi are particularly eye - catching in the water, making it a work of art in the fish pond.
These koi varieties each have their own characteristics. They not only differ in ornamental value but also symbolize different kinds of good luck and meanings. Choosing a koi variety that suits you can not only increase the pleasure of appreciation but also let you experience the joy and sense of achievement of fish - keeping.