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
Arab states of the Persian Gulf and Oman come in second and third respectively within the regional ranks. The six Arab states of the Persian Gulf lie in a volatile region and their six governments, with varying degrees of success and effort, try and advance peace in their own countries and other countries. However, Arab countries in the Persian Gulf region - specifically Saudi Arabia and Qatar - stand accused of funding Islamist militants such as Hamas and the Muslim Brotherhood. According to the Institute of Economics and Peace (IEP)'s Global Peace Index of 2016, the six governments had varying degrees of success in maintaining peace