Midorigoi are green or yellowish-green koi.
Midorigoi originated in the 1960’s, when Shusui and Yamabuki brood stock were crossed. Because of the Shusui blood present in the first Midorigoi, they were always doitsu (scaleless). In recent years, a scaled version of Midorigoi has been developed. However the vast majority of Midorigoi that you will see on the market today are scaleless.
What To Look For
High quality Midorigoi follow many of the same criteria as Shusui. The single line of dark scales down the back should be uninterrupted and as symmetrical and rhythmic as possible. Preferably, they should form a zipper-like pattern. Missing or out of place scales will seriously detract from the overall beauty of a Midorigoi.
Additionally, the yellow base color of the skin should be of an even hue and tone across the entire body. Watch out for blemishes in the form of black spots that may appear on the body, a fault that is common in Shusui as well as Midorigoi. Preferably, the head should be a smooth and consistent yellow, with no apparent blemishes. However, in practice, this can be quite difficult to find in this rare variety. The skull will show through the head on many young Midorigoi. The skull may become less visible and the head may clear up as the koi matures, but this is not guaranteed.