Red tide crisis in Chiloé
The red tide crisis in Chiloé, also known as "Chilote May" (Spanish: Mayo chilote), was a social, economic and environmental catastrophe that occurred in the Chiloé Archipelago, southern Chile, in the southern autumn of 2016, as a result of a severe algal bloom of the dinoflagellate Alexandrium catenella — a microalgae responsible for the phenomenon known as red tide. The bloom spanned the months of March and April and affected the outer sea of the Los Lagos Region, the inland coast of Chiloé, and the Chacao Channel.
Source: Wikipedia — Red tide crisis in Chiloé (CC BY-SA 4.0)