• Purple, yellow, gold and orange sponges and soft corals wave against a turquioise sea.

    Biscayne

    National Park Florida

Hydrologic Activity

Biscayne Bay is shallow and well mixed with only a very weak density gradient. This horizontal density gradient is salinity based, resulting from the freshwater runoff of canals on the western side. Salinity in the bay is controlled by a pronounced wet-dry seasonal dynamic and is highest in June when rainfall is low and evaporation high.

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