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
History of the west coast of North America economy also benefited the region as the ability to trade across the Pacific continued to show its great potential. However, only a few decades later, Japan would become a major threat. During World War II, there were few attacks against North America, but the occasional Japanese submarine lurked off the shores. Japan tried to damage the region by sending over thousands of Fu-Go balloon bombs in an attempt to light forest fires. These were generally ineffective; a few landed in either Canada or the United States but they caused no great destruction. More destructive was the internment of ethnic Japanese,