Juan Mabromata/AFP via Getty Images
It may look like these capybaras (Hydrochoerus hydrochaeris) are sitting in a swirl of green paint, but it’s actually a slick of potentially harmful cyanobacteria on the surface of the Salto Grande lake. This artificial lake formed following the damming of the Uruguay river on the border of Uruguay and Argentina. Cyanobacteria blooms occur each year when both water temperatures and nutrient levels are high.
