North Atlantic Sargassum Bloom Hits Record Levels – and Florida is Feeling the Surge, One Expert Says

New record-setting bloom raises concerns for marine ecosystems, tourism, and public health.

Jul 9, 2026

1 min

Brian LaPointe, Ph.D.



Dr. Brian LaPointe, Research Professor at Florida Atlantic University’s Harbor Branch Oceanographic Institute, is one of the nation’s most recognized experts on marine ecosystems.


His work spans algal physiology, biochemistry, biodiversity, and coastal conservation — with more than a decade of dedicated research focused on the rise and impact of sargassum blooms across the Atlantic.




LaPointe confirmed that sargassum levels in the North Atlantic have hit a new biomass record — and much of it is now washing ashore across South Florida’s coastlines.


The scale of this bloom, he says, could have lasting consequences for marine ecosystems, tourism, and public health.



LaPointe recently spoke to CNN about why this record bloom is raising alarm bells:



“Sargassum goes from being a very beneficial resource of the North Atlantic to becoming what we refer to as… a harmful algal bloom when it comes ashore in excessive biomass.”


Ammonia is another problem emitted by the decaying seaweed, LaPointe noted. The chemical compound “strips the oxygen out of the waters along our coastal ecosystems like mangroves, coral reefs, seagrass beds,” he said.


The scale of the bloom is staggering. According to University of South Florida estimates cited by LaPointe, over 31 million tons of sargassum have been detected this year — a 40% increase over the previous record.


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Brian LaPointe, Ph.D.

Brian LaPointe, Ph.D.

Research Professor at FAU’s Harbor Branch Oceanographic Institute

Brian Lapointe’s research interests include algal physiology and biochemistry, marine bioinvasions and marine conservation.

Marine BioinvasionsCoral Reef EcologyAlgal PhysiologyBiochemistrySeagrass Ecology