Persian Gulf flooding of the basin started 15,000 years ago due to rising sea levels of the Holocene glacial retreat. This inland sea of some is connected to the Gulf of Oman in the east by the Strait of Hormuz; and its western end is marked by the major river delta of the Shatt al-Arab, which carries the waters of the Euphrates and the Tigris. In Iran this is called "Arvand Rood", where "Rood" means "river". Its length is , with Iran covering most of the northern coast and Saudi Arabia most of the southern coast. The Persian Gulf is about wide
Arab states of the Persian Gulf used to refer to the inhabitants of Eastern Arabia. Historically, "Khaleeji" meant descendants of Ichthyophagi, the coast-dwelling "fish eaters". Geographically, the Arabic-speaking is solely Eastern Arabia. Press in the Arab states of the Persian Gulf have varying degrees of freedom with Kuwait topping the league with a lively press that enjoys considerably more freedom than its Persian Gulf counterparts according to Freedom House and Reporters Without Borders. Both organizations rank Kuwait's press as the most free of all Arab states of the Persian Gulf and, in fact, rank amongst the top three most free press in the Arab world. Qatar