Ok, it’s not called Assateague Sound. Officially, it’s Chincoteague Bay. But it’s almost all behind Assateague Island, not Chincoteague. And where I come from, bodies of shallow water behind barrier islands are called Sounds. In Georgia and the Carolinas, even the river mouths are called Sounds. Bays are big and round and deep. This body of water is big, yes. Round and deep, no.