#consang friendly

Butterfly koi, longfin koi, or dragon carp are a type of ornamental fish notable for their elongated finnage. The fish are a breed of the common carp, Cyprinus carpio, which includes numerous wild carp races as well as domesticated koi (nishikigoi). In July 1977, the then Crown Prince Akihito visited the Saitama Prefectural Fisheries Experiment Station and suggested that there was a carp with a long fin in Indonesia (Cypirnus carpio var. flavipinnis C.V), and that they should be crossed with the Japanese pond smelt. This prompted the Station to start breeding koi in 1980, and two years later, this breed was born.