a gulf northwest of the Indian Ocean, lying between the Arabian Peninsula and Iran. The Persian Gulf is joined in the east to the Arabian Sea by the Strait of Hormuz and the Gulf of Oman. Extending 926 km inland, the gulf has an area of 239,000 sq km and a width of 180 to 320 km. Depths less than 50 m predominate; the maximum depth is 102 m. There are many small islands along the coasts and many coral reefs in the southern part. Bahrain and Qeshm are the most important islands. The Shatt al-Arab flows into the gulf.
The Persian Gulf’s hydrological profile makes it a continental sea. The water temperature is 30°-33°C in August and 15°-21°C in February. Salinity is as high as 40‰; near the estuary of the Shatt al-Arab it is 30‰ The currents flow counterclockwise. There is fishing and pearl diving in the gulf.
Vast oil deposits are located beneath the gulf and in the surrounding regions. The principal ports are al-Faw and al-Basra (Iraq, on the Shatt al-Arab); Abadan (on the Shatt al-Arab), Bendare-Shahpur, Bendare-Mah Shahr, and Khark (Iran); al-Kuwait (Kuwait); Ra’s at Tannurah (Saudi Arabia); Manamah (Bahrain); Musay’id (Qatar), and Abdu Dhabi (United Arab Emirates).