Kumonryu are one of the strangest Koi. They are scaless and their pattern actually changes throughout the year. No one is absolutely sure what causes the color change, but the two best theories are a change in temperature or a change in pH. Kumonryu are usually black in the winter and the white usually appears in the spring and summer.
Kumonryu aren't usually judged by their pattern. Look for good symmetry between the black and white. When the color of a Kumonryu is changing, the area turns a blue/grayish color.
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