noun
a phylum of bacteria that obtain their energy through photosynthesis and are commonly found in various environments such as freshwater, marine, and terrestrial habitats
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Cyanobacteria are a type of photosynthetic bacteria that can be found in various aquatic environments.
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Did you know that cyanobacteria are sometimes referred to as blue-green algae?
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Watch out for that pond, it's full of cyanobacteria!
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The cyanobacteria in the lake spread like wildfire, taking over every corner of the water.