Genus: Microcystis | Cyanobacteria
Species in photograph: Microcystis aeruginosa
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Description: Colonial species. Colonies tend to float near the surface in nutrient-rich fresh water and other low-salinity waters. Cells have no individual mucilaginous envelopes, but the colony is encased in a fine colorless mucus. Can produce toxins (microcystins), and dense blooms can be dangerous to aquatic ecosystems as well as animal and human health.
Cell Size: 2-3um
Synonym: Polycystis aeruginosa