What is the name of the sea that is located between the Korean Peninsula and the Japanese archipelago?

What is the world's largest sea by surface area? Which strait connects the Atlantic Ocean to the Mediterranean Sea? What is the name of the sea that separates the islands of Great Britain and Ireland? Which sea is located between the Scandinavian Peninsula and the British Isles? 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? What is the name of the sea that is located between the Crimean Peninsula and the Caucasus? Which ocean is home to the Mariana Trench?