This genus' most widespread and well-known member is the common carp (C. carpio). It is famed as afood fish and widely traded and introduced since antiquity, but in certain areas has multiplied inordinately and become a pest. In some places, such as Australia[verification needed], it is illegal to not kill a Common Carp when you can, due to their severe overpopulation. In its long use it has been domesticated, and a number of breeds have been developed for food and other purposes. The koi (from Japanese nishikigoi, 錦鯉) are well-known common carp breeds, selectively bred for being enjoyed by spectators from above. Strictly speaking, "koi" is simply the Japanese name of the common carp.