and how gracefully the fish moves in the water. But the most important trait of all is the koi's coloring. The best koi have a good balance of colors and patterns according to their variety.

The best koi fish also rarely leave Japan, making it harder for outside breeders to achieve similar outcomes. Their care ...

and how gracefully the fish moves in the water. But the most important trait of all is the koi's coloring. The best koi have a good balance of colors and patterns according to their variety.

The nation’s top koi aficionados will bring their most spectacular fish — up to 3 feet long — to South San Jose to compete this weekend, April 5-6, in the ZNA NorCal National Koi Show.