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 ...

When scientists heard reports that a large, mysterious fish had been caught in Cambodia in 2020, excitement stirred. Could this be the “Mekong Ghost,” they asked - an elusive fish that hadn’t been ...

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 ...