Credit: Andy Glogower/Getty Images One of Florida's most family-friendly destinations, Clearwater Beach is also a launchpad for visiting more secluded Gulf Coast beaches like Caladesi Island State Park.Spot dolphins on a sunset cruise while exploring the coastline of Orange Beach, Alabama, or bird-watch on Padre Island in Texas.Keep the white sands but escape spring break crowds at Mississippi's Bay St. Louis Beach. Five U.S. states are lucky enough to have a coastline on the Gulf of Mexico. Texas, Louisiana, Mississippi, Alabama, and Florida attract millions of travelers each spring and summer to their white-sand beaches and emerald waters. With something for every beachgoer, like St. Pete's water clarity, incredible bird-watching on Dauphin Island, or the long-standing seafood reputation of Bay St. Louis, these are the 10 best Gulf Coast beaches. Clearwater Beach, Florida Getty Images There's plenty to do on Clearwater Beach, one of the most family-friendly beaches in Florida.…