白海, or the White Sea, is a marginal sea located in the northwest of Russia. It is part of the Barents Sea and is bordered by the Kola Peninsula to the west and the Onega Peninsula to the east. The sea is known for its cold waters and is typically covered with ice during the winter months. The White Sea has several important rivers flowing into it, including the Dvina River and the Onega River. It is home to various marine life and supports local fishing industries. The sea also has historical significance, as it was a key route for trade and exploration in the past.