Koi Types
Kumonryu
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
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.