Original: Geography The coasts of the peninsula are , on the west the Red Sea and the Gulf of Aqaba , on the southeast the Arabian Sea ( part of the Indian Ocean ) , and on the northeast , the Gulf of Oman , the Strait of Hormuz , and the Persian Gulf .
Simplified: The coastal limits of Arabia comprise : on the southwest the Red Sea and Gulf of Aqaba ; on the southeast the Arabian Sea ; and on the northeast the Gulf of Oman and the Persian Gulf .