The Skagerrak strait runs between Norway and the southwest coast of Sweden and the Jutland peninsula of Denmark, connecting the North Sea and the Kattegat strait, which leads to the Baltic Sea.

Name
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. Some ports along the Skagerrak are Oslo and Kristiansand in Norway and Uddevalla and Strömstad in Sweden.
The Skagerrak has a salinity of 30 practical salinity units. The volume available to biomass is about 3,600 square kilometers (1,390 sq mi), including a wide variety of habitats from the sandbanks to Sweden and Denmark to the deeps of the Norwegian trench.