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Diagnostic features

Many small spherical to ovoid cells packed in mucilage (usually densely), forming randomly shaped colonies. Cells contain gas vesicles (difficult to see).  Forms thick blue-green scums.

Typical habitats

Blooms in nutrient rich lakes/ponds in spring/summer


Kingdom Bacteria
Phylum Cyanobacteria
Class Cyanophyceae
Order Chroococcales
Family Microcystaceae
Common name Cyanobacteria