A significant amount of sargassum seaweed has been reported along the shores of South Florida, presenting challenges for beachgoers and local communities. According to scientists at the University of South Florida's Optical Oceanography Lab, sargassum levels reached a record high for May 2026. Researchers estimate that approximately 4% of the ocean's surface is currently covered by this seaweed, with expectations for further increases in June.
The decomposition of sargassum releases hydrogen sulfide gas, which can cause irritation to the eyes, nose, and throat, particularly affecting individuals with asthma or other respiratory issues, as noted by the Florida Department of Health. Residents have expressed concerns about the odor associated with the decomposing seaweed, describing it as unpleasant. Online discussions reveal that many beachgoers find the smell to be a significant drawback to their beach experience.
Sargassum is a naturally occurring brown algae found in the Atlantic Ocean, Caribbean Sea, and Gulf of Mexico. While it provides habitat for various marine species, including sea turtles and fish, the recent increase in its blooms has raised concerns among coastal communities. Historically, sargassum was primarily located in the Sargasso Sea, but its range has expanded since 2011, leading to the formation of the "Great Atlantic Sargassum Belt."