Spring Viremia of Carp (SVC)
Like the name suggests, SVC in seen only in the spring as pond temperatures are rising. It's usually seen between 40 and 60 degrees Fahrenheit.
This virus is much less damaging than KHV and currently is very rare in the . SVC produces symptoms typical of those seen with many infections and can include dropsy, hemorrhages and/ or darkening of the skin.
SVC is classified as a "reportable" disease, so a confirmed diagnosis can lead to heavy handed federal government involvement.