What’s koi got to do with it? Souring relations between Asian rivals Japan and China now seem to be snagged on calm-inducing beauty in spas, museums and gardens. The slippery dispute between Asia’s two biggest economies adds to their spat over Japan's release into the sea of treated but radioactive water from the tsunami-hit Fukushima nuclear power plant. And it has prompted more questions than answers.
Here's what you need to know about the fish and their role in the dispute:
