A red tide bloom looming offshore since Hurricane Milton is now prompting health warnings in parts of Southwest Florida. In particular, areas around Sanibel Island and Naples showed high numbers ...

A red tide alert sign is seen at beachside at Gulfside City Beach Park on Sanibel on Wednesday, Feb. 5, 2025. Red tide has been documented off the coast of Southwest Florida including Sanibel.

Red tide is caused by high concentrations of a toxin-producing microscopic algae, called K. brevis, that is found in the Gulf of Mexico. Tests conducted Dec. 5 of water samples confirm the red tide.

The Florida Department of Health has issued several red tide warnings in Southwest Florida recently. In Sanibel, red tide has taken over popular beaches, causing concern among residents and visitors.

Satellite images published by the National Centers for Coastal Ocean Science shows that red tide is blooming in the Gulf, off the coast of Sanibel Island in Lee County. Imagery shows the bloom ...

Department of Health in Lee County has released another red tide advisory, this time for Tarpon Bay Road beach park. A red tide bloom has lingered along the coast since late last summer, and ...

A patchy yet persistent red tide bloom that started last fall continues to hang around in Southwest Florida waters. It stretches from Tampa Bay to Sanibel Island. Levels of the toxic algae ...

Water samples taken on Monday showed medium concentrations of red tide. “We were seeing the counts go down around Sanibel for about two weeks. But then they suddenly jumped up again, that’s ...