French archaeologist Franck Goddio, renowned as the discoverer of Thonis-Heracleion delivers a presentation during the Alexandria International Conference on Maritime and Underwater Archaeology in Alexandria, Egypt on Oct. 31, 2016. A three-day international conference on underwater archaeology started Monday in Egypt's Alexandria, a city famous for its rich underwater antiquities.

Scientists and archaeologists attend the Alexandria International Conference on Maritime and Underwater Archaeology in Alexandria, Egypt on Oct. 31, 2016. A three-day international conference on underwater archaeology started Monday in Egypt's Alexandria, a city famous for its rich underwater antiquities.

Egyptian Minister of Antiquities Khaled El-Enany addresses the opening ceremony of the Alexandria International Conference on Maritime and Underwater Archaeology in Alexandria, Egypt on Oct. 31, 2016. A three-day international conference on underwater archaeology started Monday in Egypt's Alexandria, a city famous for its rich underwater antiquities.