Harmful algal blooms lead to biotoxins that can't be removed by boiling or freezing. Aquafarmers, researchers, and regulators are doing their best to prevent them from entering our shellfish diet, but climate change and poor infrastructure are making their jobs more difficult than before.

More from Bárbara Pinho: https://www.thexylom.com/post/aquafarmers-are-fighting-a-losing-battle-to-keep-algae-from-ruining-their-shellfish