The black coloring (sumi ... and they became one of the most prized types of koi fish. They’re available for as low as $70, ...

Their cells can be red, yellow, black, white, blue ... and is the most expensive koi fish ever sold. Koi may just look like an oversized goldfish, but they're not even remotely related.

Powdered fish meals that farms use are also becoming ... They believe that feeding koi black soldier fly larvae may enhance their white blood cells’ ability to ingest pathogens, and that ...

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.