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 ...

Sourcing and selling koi carp — some of the most expensive pet fish in the world — can be both a profitable business and an enjoyable pursuit. This is especially true for Tim Waddington, the owner of ...

Nishikigoi, better known as koi fish, are a well-known variety of the common carp. They are bright red and white and revered for their vibrance and grace. Even other animals, including their predators ...

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 ...