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 ...

It is the dream of many anglers growing up to own their own lake or fishery as they get older, but unfortunately very few ...

"Trump dump: president throws entire box of fish food into precious koi carp pond," the headline read. A subhead continued: "While his host, Japan's prime minister Shinzo Abe, spoons small amounts ...

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 £ ...

Rob Whittell, chairman of the British Koi-Keepers Society, told the BBC: “Any metals are not good for carp. “Copper is not ideal and is toxic to fish. In fact any metals can cause problems.” ...