Abu Dhabi is the capital and the second-most populous city of the United Arab Emirates (after Dubai). The city of Abu Dhabi is located on an island in the Persian Gulf, off the Central West Coast. Most of the city and the Emirate reside on the mainland connected to the rest of the country. As of 2020, Abu Dhabi's urban area had an estimated population of 1.48 million, out of 2.9 million in the emirate of Abu Dhabi, as of 2016. The Abu Dhabi Investment Authority is headquartered in the city, and was the world's 3rd largest sovereign wealth fund in 2020. Abu Dhabi itself has over a trillion US dollars worth of assets under management in a combination of various sovereign wealth funds headquartered there.
The pearl diving business was a key industry prior to the discovery of oil reserves. According to a source about pearling, the Persian Gulf was the best location for pearls. Pearl divers dive for one to three minutes and would have dove up to thirty times per day. There were no air tanks and any other sort of mechanical device was forbidden. The divers had a leather nose clip and leather coverings on their fingers and big toes to protect them while they searched for oysters. The divers were not paid for a day's work but received a portion of the season's earnings.en.wikipedia.org