Whether it is shelling, fishing, boating, birding or just enjoying the view of the water, tides and currents affect most of our lives daily. Have you ever wondered why the islands sometimes have just one tide a day or why you can see sea grasses when the tide chart says it is high tide? In the past few years more people have become aware of the Florida Shelf. Where is it and why is it important? This is an introduction how water behaves as the earth spins, the moon orbits and the winds blow. Members and children 17 and under are free. Cost is $5 per adult, with members and children free.