Baltic Sea as species in 2005 and 2018 respectively, having formerly been confused with more widespread relatives. The tiny Copenhagen cockle ("Parvicardium hauniense"), a rare mussel, is sometimes considered endemic, but has now been recorded in the Mediterranean. However, some consider non-Baltic records to be misidentifications of juvenile lagoon cockles ("Cerastoderma glaucum"). Several widespread marine species have distinctive subpopulations in the Baltic Sea adapted to the low salinity, such as the Baltic Sea forms of the Atlantic herring and lumpsucker, which are smaller than the widespread forms in the North Atlantic. A peculiar feature of the fauna is that it contains a
North Pacific Anadromous Fish Commission the Convention Area. The NPAFC Convention area includes the waters of the North Pacific Ocean and adjacent seas (Bering Sea, Sea of Okhotsk), north of 33°N Latitude in international waters beyond the 200-mile zones of coastal states. Although not part of the Convention area, member nations may conduct scientific activities south of 33°N Latitude beyond the 200-mile zone. Anadromous fish covered under the Convention include Pacific salmon and steelhead trout: Following the conclusion of WWII and the signing of the San Francisco Peace Treaty in 1952, Canada, Japan, and the United States of America entered into a trilateral fisheries convention