Koi have six types of color cells in their ... It won grand champion at the All Japan Koi Show in 2017, and is the most expensive koi fish ever sold. Koi may just look like an oversized goldfish ...

Here's what you need to know about the fish and their role in the dispute: Koi are beautifully hued and expensive carp formally called nishikigoi in Japan. The fish, appreciated as “swimming ...

colorful varietals of black carp were being kept by Japanese emperors and nobility." While koi were originally bred for consumption, like all other carp, farmers began breeding the fish species ...