The term 'Arm of the Mediterranean' refers to four distinct bodies of water: the AEGEAN Sea, the ADRIATIC Sea, the Ionian Sea, and the ADRIATIC Sea. The AEGEAN Sea is located between Greece and Turkey and is connected to the Black Sea by the Dardanelles and the Bosporus. The ADRIATIC Sea is located between Italy and the Balkan Peninsula and is connected to the Ionian Sea by the Strait of Otranto. The Ionian Sea is located between Greece and Italy and is connected to the Mediterranean Sea by the Strait of Messina. The ADRIATIC Sea is located between Croatia and Italy and is connected to the Mediterranean Sea by the Strait of Otranto.