Once a simple food fish, koi have transformed into living jewels, with some fetching sky-high prices in the global luxury market. Here's how this happened. In the world of high-end pets, few creatures ...

A dozen koi fish poke their faces up to the pond’s surface, hoping for a bite to eat. They’re smarter and more social than most would give them credit for, and they recognize horticulturists Mark ...

Ray Armstrong and Robert Winkler admit to being “koi kichi” — koi crazy. They certainly are. The dentists are so enthralled with koi that they travel to Japan at least once a year to buy some of these ...