My profession is a phycologist. Phycology the branch of botany dealing with algae. Trust me it is primarily Cyanobacteria.
http://learn.org/articles/How_Do_I_Become_a_Phycologist.htmlFA is primarily or almost always a type of green algae aka Chlorophyta and exists as filamentous algae thus FA. There are also lots of species of unicellar and colonial green algae. Whereas your particular type of Cyanobacteria exists as tricomes with gelatinous sheaths not true filaments that grow in mats usually attached to mud bottoms. This type of algae is called 'epipelic".
Lots of it dying can at times produce toxins in the water and be toxic to animals that eat it. The Cyanobacteria that are considered harmful are unpredictable as to when they produce toxins and are still being researched as to why and when.
