Hand-reared for their color and beauty, koi carp have become an iconic symbol of Japan that can sell for hundreds of thousands of dollars and even participate in fishy beauty contests. The nation’s ...

It’s hard to imagine, with all the great iPhone apps for sale on the App Store, that the top paid app (App Store link) would involve meandering Japanese carp, floating lily pads, and ambient noise.

Fish have for decades been popular in Japan, where top breeders take their most prized specimens to highly competitive ‘beauty parades’ Kazo (Japan): Hand-reared for their colour and beauty, koi carp ...