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 Celtic Sea and is approximately 140 miles long. The sea is known for its rich marine life and is an important route for shipping and fishing. Several islands, including the Isle of Man, are situated within the Irish Sea. Major cities along its shores include Dublin in Ireland and Liverpool in England. The sea plays a significant role in the economy and culture of the surrounding regions, facilitating trade and tourism.