 Lytic infection of unicellular algae by chloroviruses results in termination of algal blooms and the subsequent release of carbon, nitrogen and phosphorus trapped in the cells, transporting them to lower trophic levels and, ultimately, fueling the food chain.Viruses in the genus "Chlorovirus" are enveloped, with icosahedral and spherical geometries, and T=169 (triangulation number) symmetry.The diameter is around 100-220 nm.