What is the name of the sea that borders the countries of Sweden and Finland?

Which ocean current is responsible for warming Western Europe? Which ocean is home to the island of Hawaii? Which ocean current surrounds Antarctica? Which sea is connected to the Mediterranean Sea through the Bosphorus and the Dardanelles? Which sea is located between the Italian Peninsula and the Balkan Peninsula? What is the world's deepest ocean? What is the world's saltiest body of water? Which ocean has the highest tides?