The Skagerrak (left) is a strait running between Norway (left edge), the southwest coast of Sweden (above) and the Jutland peninsula of Denmark (below), connecting the North Sea and the Kattegat Sea area (below center), which leads to the Baltic Sea (right).
The Skagerrak is roughly triangular in shape, measuring 240 kilometers (149 mi) in length, and between 80 km (50 mi) and 140 km (87 mi) in width. It deepens toward the Norwegian coast, reaching over 700 metres at the Norwegian Trench.
The Skagerrak has a salinity of 30 practical salinity units. The volume available to biomass is about 3,600 square kilometers (1,390.0 sq mi), including a wide variety of habitats from the sandbanks to Sweden and Denmark to the deeps of the Norwegian trench.
Here, other than some sediments hugging the northwest coast of Denmark, the shores of the Skagerrak are mostly clear.