Puget Sound only Puget Sound proper but also for waters to the north, such as Bellingham Bay and the San Juan Islands region. The term "Puget Sound" is used not just for the body of water but also the Puget Sound region centered on the sound. Major cities on the sound include Seattle, Tacoma, Olympia, and Everett, Washington. Puget Sound is also the third largest estuary in the United States, after Chesapeake Bay in Maryland and Virginia, and San Francisco Bay in northern California. In 1792 George Vancouver gave the name "Puget's Sound" to the waters south of the Tacoma Narrows, in
South Puget Sound shelter whale calves. Southern resident killer whales (orcas) have been reported as far south as Eld Inlet. Smaller species include Dall's porpoise (Phocoenoides Dalli), harbor seals (Phoca Vitulina) and the Pacific harbor porpoise (Phocoena phocoena). A single sea otter was sighted in the South Sound in 2012. South Puget Sound South Puget Sound is the southern reaches of Puget Sound in Southwest Washington, in the United States' Pacific Northwest. It is one of five major basins encompassing the entire Sound, and the shallowest basin, with a mean depth of . Exact definitions of the region vary: the state's Department of