The İrlanda Denizi, or the Irish Sea, is a body of water located between the east coast of Ireland and the west coast of Great Britain. It connects the Atlantic Ocean to the north and the Celtic Sea to the south. The sea is approximately 200 kilometers long and varies in width, with its narrowest point being around 30 kilometers. The İrlanda Denizi is known for its rich marine life and is an important route for shipping and fishing. Major cities along its shores include Dublin in Ireland and Liverpool in England. The sea also features several islands, such as Anglesey and Isle of Man.