Sargassum

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Sargassum: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Last Updated: Jun 03, 2025

News •

Scientists say a record amount of seaweed hit the Caribbean and nearby areas in May • June 3, 2025, 4:33 PM ET (AP)

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Also Known As	gulfweed • sea holly

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sargassum weed Sargassum muticum Sargassum fluitans rockweed Fucus