The Baltic Sea is a brackish inland sea located in Northern Europe, bordered by countries such as Sweden, Finland, Estonia, Latvia, Lithuania, Poland, Germany, and Denmark. It connects to the North Sea through the Kattegat and Skagerrak straits, making it an important maritime route for trade and transportation. This sea is known for its unique ecosystem, which includes various species of fish and marine life adapted to its low salinity. The Baltic Sea also plays a significant role in the cultural and historical connections among the surrounding nations, influencing their economies and societies over centuries.