The prefecture is the origin of ornamental koi carp, or nishikigoi as they are ... unused biomaterials from rice production for fish feed, and is integrating advanced water treatment technology ...

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 ...

While koi were originally bred for consumption, like all other carp, farmers began breeding ... The food is also designed to float so the fish come up to the surface to feed, delighting spectators ...

Koi herpesvirus (KHV ... Warwickshire and Essex and has killed fish at all sites, the Fish Health Inspectorate said. It affects all varieties of common and ornamental carp and can result in ...