Album DescriptionNational Public Radio(r) and the National Geographic Society present Frontiers in the Sea, a special digital stereo production of Radio Expeditions, the acclaimed series hosted by NPR's Alex Chadwick. On this CD, we visit the National Marine Sanctuaries - America's frontiers in the sea. Join us as we track migrating whales through waters off California; dive down to examine the fragile coral reefs of the Florida Keys; and explore the coastal waters of Georgia with an underwater archaeologist. Learn about the treasures that thrive within, and the threats to the survival of the National Marine Sanctuaries.