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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.”

Fact source: Wikipedia

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