Corey Perrine/Staff A woman gets a closer look at the ground littered with shells, birds and dead fish Friday, Oct. 19, 2012, at Barefoot Beach State Preserve in Bonita Springs, Fla. An agal bloom, known commonly as red tide, is a phenomenon where high concentrations of Karenia brevis, a microscopic marine algae, contain toxins that paralyze the nervous system in fish. In large quantities, they cause the water to appear red or murky, hence the name. The blooms can affect humans causing eye and respiratory conditions such as coughing, sneezing, tearing and itching.

Photo by COREY PERRINE

Corey Perrine/Staff A woman gets a closer look at the ground littered with shells, birds and dead fish Friday, Oct. 19, 2012, at Barefoot Beach State Preserve in Bonita Springs, Fla. An agal bloom, known commonly as red tide, is a phenomenon where high concentrations of Karenia brevis, a microscopic marine algae, contain toxins that paralyze the nervous system in fish. In large quantities, they cause the water to appear red or murky, hence the name. The blooms can affect humans causing eye and respiratory conditions such as coughing, sneezing, tearing and itching.

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