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
Action in the North Atlantic Action in the North Atlantic Action in the North Atlantic (also known as Heroes Without Uniforms) is a 1943 American black-and-white war film from Warner Bros. Pictures, produced by Jerry Wald, directed by Lloyd Bacon, that stars Humphrey Bogart and Raymond Massey as sailors in the U.S. Merchant Marine during World War II. Typical of other films in the era, "Action in the North Atlantic" was created as a morale boosting propaganda film. As noted by film critic Bosley Crowther, "... it's a good thing to have a picture which waves the flag for the merchant marine. Those boys are