Sargassum is a type of brown seaweed that is washing up on beaches in Florida. As it rots, it gives off a substance called hydrogen sulfide. Hydrogen sulfide has a very unpleasant odor, like rotten eggs.
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? Avoid touching or swimming near seaweed to avoid stinging by organisms that live in it. ? Use gloves if you must handle seaweed. ? Stay away from the beach if you experience irritation or breathing problems from hydrogen sulfide—at least until symptoms go away. ? Close windows and doors if you live near the beach.
Sargassum seaweed is a nutritious food, rich in carotenoids, cellulose, protein, and aspartic and glutamic acids. It has a long history of traditional use and has been used in Asian traditional medicine systems for thousands of years.
Substantial sargassum is expected in June in both the Caribbean Sea and Gulf of Mexico, according to the May report from the University of South Florida. That's no surprise to beachgoers who have been seeing the smelly seaweed on Florida beaches from Pensacola to Brevard County.
In April, the seaweed set a record, with scientists identifying 3 million tons of sargassum in the Caribbean Sea. Piles of sargassum seaweed are accumulating on the beaches of Florida's Key West. Scientists say the seaweed is expected to increase even more over the next few months.