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Scientific classification
Kingdom: Bacteria
Division: Cyanobacteria
Class: see [1]
Order: Nostocales
Family: Nostocaceae
Genus: Aphanizomenon

Aphanizomenon flos-aquae

Aphanizomenon is an important genus of cyanobacteria that inhabits freshwater lakes and can cause choking blooms. Studies on the species Aphanizomenon flos-aquae have shown that it can regulate buoyancy through light-induced changes in turgor pressure.[1] It is also able to move by means of gliding, through the specific mechanism by which this is possible is not yet known.


  1. Konopka, A., T. D. Brock & A. E. Walsby. 1978. "Buoyancy regulation by planktonic blue-green algae in Lake Mendota, Wisconsin." Arch. Hydrobiol. 83: 524-537.