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
Piracy in the Persian Gulf coast of Fars during the reign of Yazdegerd II. Ibn Hawqal, a 10th-century history chronicler, alludes to piracy in the Persian Gulf in his book "The Renaissance Of Islam". He describes it as such: In Richard Hodges' commentary on the increase of trade in the Persian Gulf around 825, he makes references to Bahraini pirate attacks on ships on ships from China, India and Iran. He believes the pirates were attacking ships travelling from Siraf to Basra. Marco Polo made observations of piracy in the Persian Gulf. He states that in the seventh century, the islands of Bahrain were held