Florida's red tide is a recurring harmful algal bloom that poses a persistent threat to the state's coast. The bloom, caused by Karenia brevis algae, can lead to significant fish kills and harm marine ...

Tests found evidence of red tide toxin exposure in most of the sampled dolphins after a spike in deaths across parts of the ...

Whether you're a native Floridian or a seasoned visitor to the state's coasts, you know it only takes a visit from one unwanted visitor to ruin any beach day — red tide. Karenia brevis is a naturally ...

Florida’s coastline remained largely clear of toxic algae this week, though state monitors did pick up a faint signal of red ...

Water samples collected along Florida’s Gulf Coast in early May 2026 have turned up low concentrations of Karenia brevis, the ...

Florida officials have detected low concentrations of red tide algae along the Gulf Coast, prompting stepped-up monitoring as summer approaches. The finding comes as a massive 5,000-mile Pacific ...

Red tide is a harmful algal bloom caused by the organism Karenia brevis. It is most commonly found in the Gulf of America but can appear on Florida's east coast. Red tide can cause respiratory issues ...

Every fall, coastal residents of Florida wait and wonder: Will the water stay clear, or will the red tide return? This harmful algal bloom, caused by the algae Karenia brevis, does not devastate our ...

Red tide is caused by a naturally occurring algae called Karenia brevis, which can discolor water and produce toxins. These toxins can kill marine life and cause respiratory issues in humans, ...