NOAA Ocean Explorer: Estuary to the Abyss

Pelagic brown algae in the genus Sargassum. The berry-like structures are gas-filled bladders known as pneumatocysts, which provide buoyancy to the plant. Image courtesy of H. Scott Meister, SCDNR

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Estuary to the Abyss

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NOAA Ocean Explorer Gallery

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http://oceanexplorer.noaa.gov/explorations/04etta/logs/aug25/media/sargassum.html