Spring viremia of carp (SVC) is a viral disease that can cause significant mortality in several carp species including the common carp (Cyprinus carpio). These species are raised as a food fish in many countries and koi carp have been selectively bred for the ornamental fish industry. Historically the disease has been a problem in Europe, the Middle East, and Russia, but was reported in koi and feral carp in the United States for the first time in 2002. Listed as a notifiable disease by the World Organization for Animal Health (OIE), diagnosis of SVC in farm raised fish in the US may result in quarantine of the infected fish and depopulation. This information sheet is intended to inform veterinarians, biologists, culturists, and hobbyists about SVC.