A bloom of the Florida red tide organism, Karenia brevis, persists in Southwest Florida from southern Pinellas to Lee County, with patches observed along Collier County.
Over the past week, Karenia brevis was observed in low concentrations in four samples collected from Pinellas County very low to medium concentrations in seven samples collected from Manatee County very low to high concentrations in twenty-eight samples collected from Sarasota County low to medium concentrations in twelve samples collected from Charlotte County background to medium concentrations in nineteen samples collected from Lee County and background to low concentrations in seven samples collected from Collier County.
Additional samples collected throughout Southwest Florida over the past week did not contain K. brevis.
Fish kills affecting multiple species have been reported along Manatee, Sarasota, Charlotte, and Lee counties over the past week. Respiratory irritation has also been reported in some areas of Sarasota County. Forecasts for Southwest Florida by the USF-FWC Collaboration for Prediction of Red Tides show net southern, offshore movement of surface waters, and net southern, onshore movement of subsurface waters between southern Pinellas and northern Monroe counties over the next 3 days.
This information, including maps and reports with additional details, is also available on the FWRI Red Tide website. The website also provides links to additional information related to the topic of Florida red tide including satellite imagery, experimental red tide forecasts, shellfish harvesting areas, the FWC Fish Kill Hotline, the Florida Poison Information Center (to report human health effects related to exposure to red tide), and other wildlife related hotlines.