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 ...

The 31 koi donated by Joseph Zuritsky are already living in the pond at the Japanese House and Garden. More will be introduced in May, when the water is warmer. (Emma Lee/WHYY) Joseph Zuritsky (right) ...

If you take a walk around San Francisco, it won’t take long before you see a koi fish. Not a real one, of course, although the bright orange-and-white graffiti art has the fluidity of a real fish ...

Under the cover of early-morning darkness, two men methodically whisked away thousands of dollars from a local Yucaipa restaurant on Saturday — in the form of fish — authorities said. Eighty-five koi ...