The cause appears to be due to a toxin produced by a micro algae bloom: https://phys.org/news/2020-10-kamchatka-marine-life-death-algae.html https://phys.org/n

The cause appears to be due to a toxin produced by a micro algae bloom: https://phys.org/news/2020-10-kamchatka-marine-life-death-algae.html https://phys.org/news/2020-10-kamchatka-marine-life-death-al...