Biscayne Bay (Bahía Vizcaina, in Spanish) is a lagoon that is approximately 35 miles (56 km) long and up to 8 miles (13 km) wide located on the Atlanticcoast of south Florida. It is usually divided for purposes of discussion and analysis into three parts, North Bay, Central Bay and South Bay. North Bay separates Miami Beach on its barrier island from Miami on the mainland. It has been severely affected over the last century by raw sewage releases, urban runoff, shoreline bulkheading, dredging, the creation of artificial islands and the loss of natural fresh water flow into the bay. North Bay accounts for only 10% of the water area of the bay.
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