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.

A red tide alert sign is seen at beachside at Gulfside City Beach Park on Sanibel on Wednesday, Feb. 5, 2025. Red tide has ...

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 ...

Red tide can leave beaches looking brown and murky, while also killing and washing ashore sea life. MORE: High concentrations of red tide blooming in Lee County Dead fish dotting the Sanibel ...

SANIBEL, Florida – Good news, fans of Sanibel Island and southwest Florida: the red tide outbreak that plagued the coastline for much of late summer and fall appears to be gone, at least for now.

Fish killed by red tide litter Sanibel's shores. Recent counts along Sanibel and in Pine Island Sound measured 500,000 to 760,000 cells per liter.It takes about 10,000 cells per liter to start ...

Red tide has been documented off the coast of Southwest Florida including Sanibel. Some areas are seeing dead fish. And it's not just the water that is producing toxins as wind and waves can cause ...

(WBBH/NBC News Channel) – Red tide is causing mass fish kills along Sanibel, Florida. Dead fish have been washing up along the shoreline and visitors are complaining of a pungent smell. The ...

Where the red tide is, and why it’s so dangerous for marine life. ... Fish washed ashore at the Sanibel Causeway after dying in a red tide on August 1, 2018, in Sanibel, Florida.