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 Sea and is known for its unique geography, including numerous islands and a relatively shallow depth. The gulf plays a significant role in the maritime activities of the surrounding countries. The gulf is also home to several important ports, including Helsinki in Finland and Umeå in Sweden. Its waters are influenced by both freshwater from rivers and saltwater from the Baltic Sea, creating a distinct ecosystem. The region is popular for fishing, shipping, and recreational activities.