There is a popular demand for this thread to be translated into English, so here it is...

Fact Vs Fakes, the story behind fake news photographs of Alexandria’s underwater cultural heritage, focusing on Abo Qir bay, eastern of Alexandria... https://twitter.com/ziad_morsy/status/1263174411324137472

Early discoveries of Abo Qir bay, or Canopus bay was done by Omar Toussoun Pasha, Prince of Alexandria, in 1933, when a RAF pilot noticed some unusual shapes while flying over the bay.
Prince Toussoun decided to do further searches with the help of a Royal Navey diver...

They discovered a marble head resembling Alexander the Great, and the diver described big foundations of a city underwater...
In 1990’s a French team started working in the area using remote sensing equipments in order to find the lost city... they actually found Two!

Canopus and Thonis-Heraklion cities... both cities are centuries older than Alexandria, and studies suggest that they drowned gradually underwater due to the liquidefication of soil of the ancient Canopic branch of the Nile...

Foundations of the city’s buildings were found, large number of statues, temples etc...

most of the statues were excavated, conserved and currently touring the world in an international exhibition...
Few statues are displayed at the National Museum of Alexandria

What exactly remains underwater in Abo Qir?

Well, foundations of the two cities, columns, temples, ports... and the biggest and most preserved collection of boats and anchors in the world dating back to 6th cen BC, including 75 ancient boats, 3 being studied right now!

This photograph went viral as one of the findings underwater in Alexandria, but actually its FAKE!
This is from the Neptune Memorial Reef in Florida USA

https://www.nmreef.com/ 

Another photograph wrongly attributed to Alexandria is this one, from another modern underwater park at Cape Tarkhankut

http://www.proocean.ru/index.php/eto-interesno/62-podvodnyj-muzej-na-myse-tarkhankut.html

This photograph is actually from the Atlantis Aquarium in the Bahamas

https://www.atlantisbahamas.com/things-to-do/marine-habitat

Nd finally this one is a 3D reconstruction of the Shi Cheng lion City in China!

https://china-underground.com/2014/07/01/the-majestic-city-of-shicheng-sank-beneath-qiandao-lake/

Finally, if you would like to know more information about the archaeological work underwater in this area, you can find all the information needed on the official site of the archaeological mission: https://www.franckgoddio.org/