A monster seaweed bloom is taking over the Atlantic

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Researchers at Florida Atlantic University's Harbor Branch Oceanographic Institute have released a landmark review tracing four decades of changes in pelagic sargassum - free-floating brown seaweed that plays a vital role in the Atlantic Ocean ecosystem.

Once thought to be primarily confined to the nutrient-poor waters of the Sargasso Sea, sargassum is now recognized as a rapidly growing and widely distributed marine organism, whose expansion across the Atlantic is closely linked to both natural processes and human-induced nutrient enrichment.

https://www.sciencedaily.com/releases/2025/08/250830001159.htm