Australia
Main article: 2025 algal bloom in South Australia
In March 2025, a marine heatwave-induced bloom of Karenia mikimotoi was blamed for the deaths of thousands of marine creatures, as well as coughing, sore eyes, and blurry vision in humans, along stretches of beach along the south coast of the Fleurieu Peninsula in South Australia.[8] Despite hopes that winter storms would cause the bloom to dissipate,[9] relatively mild conditions caused it to persist[10] and spread along adjacent coasts of Kangaroo Island and Gulf St Vincent (including Adelaide’s metropolitan beaches[11][12]) and into the Coorong.[13]
