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Sargassum Invasion Threatens Spring Break Beaches

The 13.6 million ton sargassum bloom threatens beaches with foul odors and health risks as levels are expected to rise, researchers warn of a major 2026 event.

  • Researchers at the University of South Florida's Optical Oceanography Laboratory say 13.6 million tons of sargassum are drifting around the Caribbean and heading northwest toward shorelines currently.
  • Researchers at the University of South Florida's Optical Oceanography Laboratory say 13.6 million tons of sargassum are drifting around the Caribbean, with levels expected to climb in 2026 due to continuous growth from November to February.
  • Maps show Puerto Rico, southern Cuba, Hispaniola and the northern Lesser Antilles are at high risk for seaweed wash-ups, according to the University of South Florida researchers.
  • Because decomposing sargassum emits hydrogen sulfide gas, health officials advise beachgoers to avoid touching or swimming near it, keep windows closed, watch children, and wear gloves if moving it.
  • NOAA notes sargassum benefits fish, sea turtles and birds by providing habitat and food, while Florida Fish and Wildlife officials monitor the bloom as spring breakers may face smelly seaweed affecting local tourism.
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Sargassum invasion threatens spring break beaches

Spring breakers hoping for pristine beaches may instead find piles of smelly seaweed as a massive bloom of sargassum heads toward parts of the United States coast:

·Seattle, United States
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Fox Weather broke the news in on Thursday, March 5, 2026.
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