View of dead Salmons at Porcelana farms in Palena province, Los Lagos region, southern Chile on April 10, 2021. - More than 4,200 tons of salmon have fallen victim to killer algae in Chile, the South American country's fisheries and aquaculture service said Thursday. It's the latest mass mortality event recorded in the world's second largest producer of salmon. (Photo by ALVARO VIDAL / AFP)