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A man in a snorkel mask and a pale yellow long-sleeve shirt floats in bright blue water, left hand extended to hold two brown fuzzy balls of cyanobacteria. In the background, the sea floor looks like mini sand dunes marching off into the gloom, littered and in some places completely covered in the dark brown piles of cyanobacteria.

Cyanobacteria Pollution

OCEANOS PI Juan Torres-Pérez holds two clumps of cyanobacteria, likely caused by runoff from on-land pollution, in the waters of Playa Melones, Culebra (Puerto Rico). In the background, dark brown piles of cyanobacteria litter the ocean floor.

Image Credit: NASA/Milan Loiacono
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Image CreditNASA/Milan Loiacono
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