In 20 Florida locations, concentrations were higher than 100,000. Health alerts for red tide have been issued in Lee, Collier counties. Toll-free hotline provides recording on red tide conditions.

Red Tide is a harmful algal bloom caused by a naturally occurring alga (a plant-like microorganism) called Karenia brevis or K. brevis. When K. brevis appears in large quantities – typically in the ...

Dead fish covered many beaches in Sarasota and Manatee County beaches over the long Valentine's Day weekend, and the impacts of red tide rolled into Presidents Day on Monday. Morning visitors ...