A Complete Guide to Koi Varieties: Common Classifications and Key Points for Selection

Koi are highly popular ornamental fish, developed through long-term selective breeding from carp, and are known for their vivid color patches and elegant swimming posture, often praised as living jewels in the water. So-called koi varieties are mainly classified according to the colors, patterns and their distribution on the fish's body, and different varieties each have their own characteristics in color combination and pattern style.

Among the many koi varieties, Kohaku, Taisho Sanke and Showa Sanshoku are often collectively called the Gosanke, and are the three most representative major groups. Kohaku is characterized by red markings on a white base; Taisho Sanke has additional black markings on top of the red and white; and Showa Sanshoku is distinguished by intense patterns dominated by black. There are also varieties such as Ogon, Utsuri, Bekko, Shusui and Chagoi, whose body colors cover many tones including golden yellow, silvery white and tea brown, each with a different style.

When selecting koi, you can observe whether the body shape is well-proportioned and smooth, whether the edges of the color patches are clear, and whether the fish swims lively and steadily. Generally speaking, individuals with harmonious pattern distribution, striking contrast and a clean white base have greater ornamental value. It should be noted that the colors of young fish will change as they grow, so there should be some allowance when making a purchase.

In terms of keeping them, koi are highly adaptable and fairly omnivorous, but they prefer spacious and clean water, and pond culture or a larger tank is more conducive to their growth. In daily care, attention must be paid to water quality maintenance and moderate feeding; in summer heat and winter cold, feeding frequency can be adjusted appropriately, and the condition of the fish should be observed regularly to reduce the occurrence of disease.

In addition to their ornamental value, koi are also often given connotations of good fortune and longevity in folk culture, and are very suitable for courtyard pond landscaping. Whether for beginner appreciation or in-depth keeping, understanding the characteristics of each koi variety helps in selecting fish suited to one's own environment.