Anything strike you as special about this fish here? Well, it's worth 1.8 million dollars. It won grand champion at the All Japan Koi Show in 2017, and is the most expensive koi fish ever sold.

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 ...