A closeup of a small mass of sargassum weed. The numerous small round spheres are floats filled with carbon dioxide. These provide buoyancy to the algae. Image courtesy of Islands in the Sea 2002, NOAA/OER.
A closeup of a small mass of sargassum weed. The numerous small round spheres are floats filled with carbon dioxide. These provide buoyancy to the algae. Image courtesy of Islands in the Sea 2002, NOAA/OER.