Megalocytiviruses cause systemic infections that can result in moderate to heavy losses in many different species of freshwater and marine fishes in both cultured and wild stocks. This 8-page fact sheet was written by Roy P. E. Yanong and Thomas B. Waltzek, and published by the UF Department of Fisheries and Aquatic Sciences, December 2010.
http://edis.ifas.ufl.edu/fa182