The Puget Sound/Georgia Basin ecosystem consists of three shallow marine basins: the Strait of Georgia to the north, Puget Sound to the south, and the Strait of Juan de Fuca that connects this inland sea to the Pacific Ocean. In addition to open water, the ecosystem includes islands, shorelines, wetlands, and the watersheds of several mountain ranges whose freshwater rivers dilute the salt water. This rich and diverse ecosystem spans the United States-Canadian border and is threatened by population growth, urbanization, agriculture, and industry. In addition to Pacific salmon, valuable ground fish, and marine mammals including orca whales, Puget Sound/Georgia Basin has three of North America's busiest ports—Seattle, Tacoma, and Vancouver, British Columbia (B.C.). Already an estimated 58% of the coastal wetlands of Puget Sound and 18% of the Strait of Georgia wetlands, which...