Bill and Linda Gibney, residents of Sanibel, shared their experiences with the red tide. “When you go in the backyard, is really the worst, and the wind just comes at you.

On Sanibel Island, a 26-foot whale shark recently washed up on the beach, WFTS reported. Many fish populations in the area have evolved to be "resilient to the impact" of red tide, since it's a ...

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.

State reports counts of 1 million cells per liter of red tide in one location miles away from Sanibel, and both Lee and Collier counties have issued red tide advisories in the past week.

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.

Karenia brevis is the organism that causes red tide, and Thompson, a Sanibel-Captiva Conservation Foundation researcher, is one of a myriad of scientists trying to better understand and maybe even ...

Reports from local scientists show red tide counts off Sanibel being as high as 20 million cells per liter, and fish kills can start when levels are between 10,000 and 100,000 cells per liter.

SANIBEL, Fla. — Editor's note: The photo above is from red tide's impact on Florida in 2018. Red tide is back in the waters off of Florida’s southwest coast, making birds sick and killing fish ...

A red tide algae bloom is being watched in waters between Sanibel and Marco Island, state Fish and Wildlife Research Institute Director Gil McRae said Wednesday.