What is the name of the sea that separates the islands of Great Britain and Ireland?

What is the world's saltiest body of water? Which ocean has the highest tides? What is the world's largest sea by surface area? Which strait connects the Atlantic Ocean to the Mediterranean Sea? Which sea is located between the Scandinavian Peninsula and the British Isles? What is the name of the sea that is located between the Korean Peninsula and the Japanese archipelago? Which ocean borders the western coast of South America? What is the name of the sea that is located between the Greek mainland and the island of Crete?