Unique Features of St. Andrew Bay
•Inflow of freshwater is minimal and originates primarily from the spring-fed flow of Econfina Creek
•The presence of river sediments typical of most estuaries is practicality non-existent in St. Andrew Bay
•Without these deposits, the bay remains deeper than most north Florida bays, lacks river-carried turbidity, and has minimal flushing from freshwater land drainage
•Because of its location on the Gulf of Mexico, the Bay has minimal tidal exchange.
•The vertical difference of the maximum tidal range (spring tides) is just over two feet (0.7m)
•Lack of a river-driven impact and minimal tides results in water that is generally saltier than most estuaries and has unusually good clarity allowing maximum light penetration and marine plant photosynthesis.
•These conditions allow exceptional growth of seagrass beds and a high diversity of marine animals.