Fish kills can start when levels reach 10,000 cells per liter. In 20 Florida locations, concentrations were higher than 100,000. Health alerts for red tide have been issued in Lee, Collier counties.

Red tide blooms occurred long before Lake Okeehochobee was connected to the Caloosahatchee River in order to drain the Everglades. However, nutrients flowing from the lake can feed blooms nearshore.

A red tide is a rapidly-growing algae bloom that, if severe, can cause red discoloration in the water, said Chatham Shellfish Constable Renee Gagne.

The Bureau of Fisheries and Aquatic Resources (BFAR) in Region 7 (Central Visayas) has declared Siit Bay in Siaton, Negros ...