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¿Qué es el Sargazo?

Graphic shows the benefits of sargassum in the ocean, how it's pushed ashore, and the hazards it poses on the beach.¿Qué es el Sargazo, de donde viene, y qué pasa cuando se arroja sobre la orilla del mar? NOAA’s sargassum infographic is now available in Spanish: https://oceanservice.noaa.gov/news/sargassum/welcome-spanish.html