The Iroise Sea is a part of the Atlantic Ocean located off the northwest coast of France. It lies between the Brittany peninsula and the Ouessant and Molène islands. Known for its rich marine biodiversity, the sea is a popular area for fishing and sailing. The Iroise Sea is also recognized for its strong currents and changing tides, making it a challenging environment for navigation. It is home to several protected marine areas, including the Iroise Marine Natural Park, which aims to preserve its unique ecosystems and promote sustainable use of its resources.