Fishermen, swimmers and seafood enthusiasts may already know the dangers of "red tides," but a recent study in Frontiers in Climate shows that climate change is increasing the frequency of one type of highly toxic algal bloom off the US west coast. These algae produce a neurotoxin—called domoic acid—that causes severe and potentially lethal digestive and neurological symptoms. This threat to marine wildlife and humans is restricting shellfish harvest in the region, but local bulletins are helping to forecast the blooms.
source https://phys.org/news/2020-12-ocean-heatwave-triggered-toxic-algal.html
