Shusui are the Doitsu counterpart of Asagi. They typically have blue-gray skin, red or orange accents, and rows of larger dark mirror scales along the back. The skin between those scales gives a different visual texture from the fully reticulated back of an Asagi.
Shusui Photos
How to Identify Shusui
- Blue-gray skin rather than a complete coat of small netted scales.
- Larger mirror scales arranged along the dorsal line.
- Red or orange on the sides, cheeks, or fins, with individual variation.
Compare Similar Varieties
Compare Asagi for the fully scaled form. A smooth-looking Doitsu koi with red and white but no characteristic blue-gray ground needs comparison with other varieties, such as Doitsu Kohaku. Doitsu describes scaling and can occur in many koi varieties; it does not by itself identify a fish as Shusui.
Choosing and Observing Shusui
Study the mirror-scale rows for an arrangement you find pleasing, and inspect both sides rather than relying on one overhead view. Neat rows are an aesthetic feature, not proof of health or a guarantee of show quality. Red extent varies between individuals. Choose the body and present appearance you enjoy, with recent photographs and seller records to support the decision.
For the complete visual directory, see koi varieties. Before purchasing, review buying koi and quarantine.