Koi are actually a type of carp, and today they're some of the most expensive pet fish in the world. But why? Koi were originally raised in Japan in the 1700s when rice farmers first began ...

Almost £1 million worth of rare koi carp collected by the late Freddie Mercury have been accidentally killed by a gardener. The Queen star's 89 fish, each more than 2ft long, were worth about £ ...

One, in particular, stands out for its remarkable longevity: the koi. With proper care, these elegant carp can become ...

Koi diplomacy is back with Japanese nishikigoi, or ornamental carp, set to return to the lucrative Chinese market after a nearly year-long hiatus. Sources have confirmed that Chinese authorities ...

Niigata is a leader in land-based aquaculture for freshwater fish. The prefecture is the origin of ornamental koi carp, or nishikigoi as they are known locally, and remains the leading producer in ...

Episode 3 - Ali and Bobby's tour takes them to northern France this time as they compete to catch the most colourful ornamental koi carp and travel to Le Prunet, a big carp lake in Sens. More info ...

Shikoku, although the smallest of Japan's main islands, plays a huge role in the country's spiritual heritage. It's home to ...