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 ...

Nicknamed "The Carrot," the fish is a hybrid species of a leather carp and koi carp, which are traditionally orange in color. The Carrot is thought to be more than 20 years old, as it was placed ...

With proper care, these elegant carp can become lifelong companions, outliving popular pets like cats and dogs. Koi fish are ...

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 £ ...

Thought to be a protein solution for a growing nation, carp fell out of favor, but the invasive species remains abundant in ...

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 ...

Koi diplomacy is back with Japanese nishikigoi, or ornamental carp, set to return to the lucrative ... resume imports of these vibrantly colored fish, although the reason for the suspension ...