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
Persian Gulf naming dispute "Persian Gulf" as the "Conventional" name, along with 14 "Variant" names in different languages, such as "Gulf of Iran", "Gulf of Ajam", "Gulf of Basra", "Arabian Gulf", "Persian-Arabian Gulf", "Gulf of Fars", and "Farsi Gulf". In "Persian Gulf States Country Studies" published in 1993 by the Federal Research Division of the U.S. Library of Congress, the authors follow the practise of the BGN by using "Persian Gulf" while acknowledging that the governments of Kuwait, Qatar, United Arab Emirates, Oman and Bahrain "officially reject the use of the term Persian Gulf—as do other Arab governments—and refer to that body of water