HAB

Microcystin: The Toxic Substance Produced by Harmful Algal Blooms Microcystin is a toxic substance produced by certain species of blue-green algae or cyanobacteria. Cyanobacteria are among the oldest living organisms on earth, and they are found in various aquatic environments including freshwater, brackish water, and marine environments. Although not all species of cyanobacteria produce toxins,