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Unlike other algae blooms, red tides are not caused by pollution, the wildlife service said.
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Red tides were documented in the southern Gulf as far back as the 1700s and along Florida's Gulf coast in the 1840s, the commission said.
CNN: Algae bloom kills record number of manatees
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In several parts of the world, such as the seas off the coast of Florida, toxic dinoflagellates sometimes develop into enormous blooms called red tides.
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"Red tides occurred in Florida long before human settlement, and severe red tides were observed in the mid-1900s before the state's coastlines were heavily developed, " the commission said.
CNN: Algae bloom kills record number of manatees
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We have also had a few health scares to keep our minds occupied - the Bird Flu scare, fish (red-tides), beef, and pork.
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