Which ocean is home to the island of Madagascar?

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? Which sea is located between the continents of Europe and Africa? What is the largest island in the Mediterranean Sea? What is the largest island in the Canadian Arctic Archipelago? Which island is divided between the countries of Indonesia and Malaysia? What is the largest island in the Caribbean Sea?