Harmful algal blooms (HABs) are overgrowths of toxic strains algae (diatoms, green) and cyanobacteria (blue-green algae). While occurring naturally, human-induced environmental changes have resulted in more frequent occurrences such worldwide. Meantime, the ecotoxicological risk HABs is rarely evaluated by means standard test methods. For first time, genotoxic potential HAB event 2020 was asses...