Midorigoi are koi identified by their greenish body coloration. The name is commonly explained as green carp. In real fish, the color is often subtler than the saturated green that a heavily edited photograph might suggest. Yellow-green and olive impressions can depend strongly on light, background, and the individual.
Midorigoi Photos

How to Identify Midorigoi
- A predominantly greenish body rather than separate red, white, or black patches.
- A color that should be assessed in neutral light and several views.
- Scaling and finish described separately rather than inferred from the name alone.
Compare Similar Varieties
Compare Kigoi for a yellow non-metallic koi and Chagoi for brown or olive-brown tones. Borderline colors can be hard to identify from photographs. Ask the breeder or seller how the fish is described and request a recent video; the camera's white balance can make a yellow fish look greener.
Choosing and Observing Midorigoi
Focus on the fish's present color, body, and skin, without assuming that its shade will remain unchanged as it develops. Darker marks should be described honestly in the sales photographs. An unusual color does not justify rushed purchasing or ignoring the usual health checks. Choose a fish you enjoy now, with room and care planned for adulthood.
For the complete visual directory, see koi varieties. Before purchasing, review buying koi and quarantine.