What killed so many fish in Argentina? Residents of Santa Rosa were left baffled after discovering thousands of dead fish had washed ashore overnight. The strange scene took place along the banks of the city and had some people worried that the fish had perished due to some kind of pollution. An official

examination of the dead fish determined that the animals had actually died of natural causes. High temperatures would have reduced the oxygenation of the lagoon to the point that it became uninhabitable for the poor fish. But how did all the other types of fish manage to survive those extreme water conditions? READ MORE