Kumonryu are non-metallic black-and-white Doitsu koi known for patterns that can change substantially. Doitsu describes reduced scaling or rows of larger mirror scales, rather than requiring every fish to have no scales at all. A Kumonryu's appearance is best understood as a record over time, not a permanent snapshot.
Kumonryu Photos
How to Identify Kumonryu
- Black and white skin pattern on a Doitsu-type fish.
- No red pattern; a red-bearing counterpart is Beni Kumonryu.
- No continuous metallic skin sheen characteristic of Kikokuryu.
Compare Similar Varieties
Check scale type and skin luster before identifying any black-and-white koi as Kumonryu. Fully scaled changing-pattern fish and metallic Doitsu fish may belong to other varieties. A dark winter photo and a lighter summer photo can document one individual, but a particular seasonal sequence is not guaranteed for every Kumonryu.
Choosing and Observing Kumonryu
Ask for dated photographs to see how the same fish has changed. Choose the body, skin, and overall character you enjoy rather than purchasing a promised future pattern. Do not change pH or temperature to force a color effect. Stable, suitable care is more useful than trying to preserve one arrangement of black and white.
For the complete visual directory, see koi varieties. Before purchasing, review buying koi and quarantine.