Koi: “Swimming jewels”

Koi carp are loved and admired for their size and bright markings and not just in Japan; breeders exported nearly $50 million worth of koi last year, with America the second-largest importer of koi in the world. Correspondent Elizabeth Palmer visits a fish beauty pageant of sorts at the All Japan Koi Show in Tokyo, and talks with fish breeders and aficionados about the charisma of koi.