"Blue-green algae (Cyanoprokaryota) are increasingly gaining importance in view of health hazards and ecological risks caused by secondary metabolites with toxic properties named “cyanotoxins”. More than 40 Cyanoprokaryota species are capable to form blooms and produce cyanotoxins. The most common and well-studied producers of cyanotoxins are Microcystis aeruginosa, Aphanisomenon flos-aquae, Anaba ...