Koi have six types of color cells in their skin ... ones with large red patches on their backs, or all-metallic gold. But the most winning fish often just boil down to these three varieties.

The nation’s top koi aficionados will bring their most spectacular fish — up to 3 feet long — to South San Jose to compete ...

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Admission is free The ZNA (Zen Nippon Arankai) outdoor show has been held in San Jose for a number of years, with fish competing in several koi classifications for color and scalation patterns.