Florida has one of the longest coastlines in the U.S.—second only to Alaska. Given the appeal of coastal living, it is not surprising that coastal counties are home to much of the state’s 17 million residents. Harmful algal blooms pose a continual threat with multifaceted impacts. Decomposing macroalgae, such as Sargassum, can emit a mixture of dangerous gasses, including hydrogen sulfide, that adversely affect the environment, marine life and human health. Supported by a grant from NOAA, scientists at the USF College of Marine Science are collaborating with researchers at Florida Atlantic University, the Caribbean Coastal Ocean Observing System (CariCOOS), NOAA Atlantic Oceanographic and Meteorological Laboratory and the U.S. Virgin Islands Department of Planning and Natural Resources to use satellite, hydrographic and water-quality data to illuminate the effects of Sargassum blooms on coastal waters and beaches. The work of these scientists will help better forecast Sargassum blooms, facilitating more effective management plans, as well as advanced warning and preparation in the case of an inundation event.