Geologically, it spans from the rocky coasts of North Greenland with large glacial inputs to the marine environments, across deep fjords in Norway and narrow sounds in Denmark, to the inner Bothnian Bay dominated by sandy and muddy sediments and wide-stretching shallow water areas. Water temperature spans from permanently around zero in North Greenland to temperatures above 20 °C during summer months in the Baltic Sea (Fig. The marine physical environment is dominated by Arctic water masses around Greenland, Atlantic waters around Iceland and the Norwegian west coast, and temperate water masses in the south and Arctic conditions in the Northern part of the Baltic Sea, which is considered to be the largest brackish water sea in the world (HELCOM, 2009).