Persian Gulf Bryde's whales, these once common residents can still can be seen in deeper marginal seas such as Gulf of Aden, Israel coasts, and in the Strait of Hormuz. Other species such as the critically endangered Arabian humpback whale, (also historically common in Gulf of Aden and increasingly sighted in the Red Sea since 2006, including in the Gulf of Aqaba), omura's whale, minke whale, and orca also swim into the gulf, while many other large species such as blue whale, sei, and sperm whales were once migrants into the Gulf of Oman and off the coasts in deeper waters, and
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