Østersøen
Østersøen is the Danish name for the Baltic Sea. It is a marginal sea of the Atlantic Ocean in Northern Europe, enclosed by the Scandinavian Peninsula, the mainland European continent, and the Danish islands. The Baltic Sea is connected to the Atlantic via the Danish Straits, which include the Øresund, the Great Belt, and the Little Belt. These straits are relatively shallow and narrow, influencing the water exchange between the Baltic and the Atlantic.
The Baltic Sea is characterized by its brackish water, meaning it has a lower salinity than typical
Several countries border the Baltic Sea, including Denmark, Sweden, Finland, Russia, Estonia, Latvia, Lithuania, Poland, and