The Celtic Sea ( ; ; ; ; ) is the area of the Atlantic Ocean off the south coast of Ireland bounded to the east by Saint George 's Channel ; other limits include the Bristol Channel , the English Channel , and the Bay of Biscay , as well as adjacent portions of Wales , Cornwall , Devon , and Brittany .
) is the area of the Atlantic Ocean off the south coast of Ireland . To the east of it are the Saint George 's Channel , the Bristol Channel , the English Channel , and the Bay of Biscay , as well as adjacent portions of Wales , Cornwall , Devon , and Brittany .