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Two hands reach into the frame, holding a clump of brownish-yellow seaweed with tiny leaves and small round balls.

Handful of Sargassum

OCEANOS instructor and sargassum expert Roy Armstrong holds a clump of the invasive algae, which has been overpopulating in the waters of the Caribbean Sea and wreaking havoc on shorefront communities like those in Puerto Rico.

Image Credit: NASA/Milan Loiacono
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