The Gulf of Bothnia is a northern arm of the Baltic Sea, located between Finland and Sweden. It is the northernmost part of the Baltic and is known for its shallow waters and numerous islands. The gulf plays a significant role in the maritime activities of both countries, including shipping and fishing. The gulf is approximately 725 kilometers long and varies in width, with its widest point reaching about 240 kilometers. It is home to several important ports, such as Helsinki in Finland and Umeå in Sweden, facilitating trade and transportation in the region.