Before Ponce De Leon charted the 1,700 islands in 1513 now known as the Florida Keys, Calusa and Tequesta Indians were fishing with spears and nets for the cornucopia of fish species they survived on. Today, 30 islands make up the habitable areas, cobbled together by 43 bridges and surrounded by waters holding more than 600 varieties of fish. The fishing paradise has brought multiple presidents--Herbert Hoover, George H. Bush, John Kennedy, Harry...