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blue-green algae
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blue-green algae
What causes algae blooms?
blue-green algae cyanobacteria
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Videos

What causes algae blooms?
Algae blooms can make lakes and oceans look like abstract paintings.
Video: Encyclopædia Britannica, Inc.

Images

blue-green algae
Blue-green algae in Morning Glory Pool, Yellowstone National Park, Wyoming.
© Yoyo_slc/Shutterstock.com
blue-green algae
A bloom of blue-green algae sitting atop the water in a freshwater pond.
Christian Fischer
cyanobacteria
Cyanobacteria in a hot spring at Yellowstone National Park, Wyoming.
© Brad Pict/Fotolia
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