- Arabian Sea northwestern part of the Indian Ocean, covering a total area of about 1,491,000 square miles (3,862,000 square km) and forming part of the principal sea route between Europe and India.
- It is bounded to the west by the Horn of Africa and the Arabian Peninsula, to the north by Iran and Pakistan, to the east by India, and to the south by the remainder of the Indian Ocean.
- Arabian Sea has depths that exceed 9,800 feet (2,990 metres).
- To the north the Gulf of Oman connects the sea with the Persian Gulf via the Strait of Hormuz.
- To the west the Gulf of Aden connects it with the Red Sea via the Bab el-Mandeb (Bāb al-Mandab) Strait. It has a mean depth of 8,970 feet (2,734 metres).
- In Roman times its name was Mare Erythraeum (Erythraean Sea).
- Political units bordering the sea—in addition to India, Iran, and Pakistan—are Oman, Yemen, and Somalia.
- The Indus and the Narmada rivers are the principal waterways draining into the sea.