Blue-green algae: Quick Facts

Written and fact-checked by

The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	Myxophyta • cyanophyta • cyanobacterium • cyanophyte • cyanobacteria

Photos and Videos

Morning Glory Pool hot spring in Yellowstone National Park, showing vivid rings of yellow, green, and blue created by cyanobacteria and algae thriving in the water.

blue-green algae

Bright green algae blooms distort the surface of water.

See All Videos and Images →

Topics

keklap lan Nostoc Spirulina Anabaena Synechococcus Anabaena azollae Oscillatoria Gloeocapsa Trichodesmium erythraeum