Conventions in this Paper: I refer to the genus as Ranavirus, the disease as ranavirus or RV. Except in the Overview, I have used endnotes to identify the sources of important statements, to allow further exploration of any claim. Overview Global biodiversity is now severely threatened by Ranavirus, a genus of virus that infect fish, amphibians and reptiles. The virus has infected both cultured and wild fish populations worldwide, and caused amphibian mortality rates of 90% or more during outbreaks. Most ranaviruses have low host specificity. Research summarized here involves 126 different species and subspecies that have contracted ranavirus. Humans appear to play multiple roles in facilitating the spread of the virus. Significant features of Ranavirus include: Low host specificity: the unusual capacity to…