Karenia brevis is the dinoflagellate responsible for the red tide in Florida and Texas. When it is in high concentrations, it causes the water to take on a reddish or pinkish color.
It is harmful to marine animals and humans, causing death and neurotoxic shellfish poisoning. Symptoms of neurotoxic shellfish poisoning include vomiting, nausea, and a variety of neurological symptoms such as slurred speech. As a result, the Gulf coast economy is negatively affected because it prevents people from being able to consume shellfish.
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