9/14/2023 0 Comments Red tide florida map nowWatch Video: Expert explains how weather impacts the spread of red tide Fish kills reported along Florida's Southwest coast occurs nearly every summer along Florida’s Gulf Coast. One of the best known harmful algae blooms in the U.S. Human illnesses caused by harmful algal blooms, though rare, can be debilitating or even fatal, according to NOAA. ![]() Harmful algal blooms occur when colonies of algae grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals and birds. The microscopic algae can multiply rapidly under the right conditions, especially when supplied by excess nutrients. At high concentrations, red tide can - but not always - give water a red or brown hue. It's common in Florida and the Gulf of Mexico, according to FWC. Red tide is caused by a higher-than-normal concentration of the algae Karenia brevis. The red tide toxins can accumulate in filter-feeders such as oysters, mussels and clams, which can lead to neurotoxic shellfish poisoning in people who consume contaminated shellfish, according to the Florida Department of Health.
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