Coral Reef Fact:
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. photo:OceanExplorer/ NOAA
Two species of macroalga, sargassum (S. natans and S. fluitans) are holopelagic. This means that they reproduce only “vegetatively and never attaching to the seafloor during their lifecycle.”
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