What is Vibrio? Vibrio is a flesh eating bacteria that thrives in warm, brackish, salty water.
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Vibrio bacteria are naturally occurring, but are present in higher concentrations in the summer when the salt water in the Long Island Sound is warmer, and filter-feeding shellfish, like oysters, can concentrate vibrio in their flesh when it's present in the water.
Harmful algal blooms may color the water red or brown, and are often referred to as red tide or brown tide. The discoloration of the water is caused by the millions of microscopic phytoplankton that bloom.
Read the beach safety signs at the entrance to the beach. Once on the beach, look for beach warning flags, often posted on or near a lifeguard's stand. A green flag means water conditions are safe and other colors mean conditions are not safe. These flags are there to protect you.