Fauna of Europe of the Baltic Sea has led to the evolution of many slightly divergent species, such as the Baltic Sea herring, which is a smaller variant of the Atlantic herring. The most frequent benthic species are "Saduria entomon" and "Monoporeia affinis", which is originally a freshwater species. A great part of its bottom is anoxic and without animal life. The Baltic Sea and North Sea are also home to a variety of marine mammals (common seals, grey seals). Europe contains several important freshwater ecoregions, including the heavily developed rivers of Europe, the rivers of Russia, which flow into the Arctic, Baltic,
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,