Passage: The Gulf of Aqaba (Arabic: خليج العقبة‎, Khalij al-Aqabah) or Gulf of Eilat (Hebrew: מפרץ אילת, Mifrats Eilat) is a large gulf at the northern tip of the Red Sea, east of the Sinai Peninsula and west of the Arabian mainland. Its coastline is divided between four countries: Egypt, Israel, Jordan, and Saudi Arabia.

Question: Aqaba's gulf has coastline among how many countries?
four countries