Some concentrations of the red tide organism Karenia brevis, referred to as "background," are normal in Gulf waters. But Pinellas, Manatee and Sarasota counties now have "high" concentrations.
There have been reports of fish kills and respiratory irritations related to the blooms on the coasts of Pinellas and Manatee. And people in Sarasota are also experiencing respiratory issues.
Red tide blooms are still being detected on the Panhandle and Atlantic coasts, as well.