I guess sharks are really intimidating @marcorp , better to watch them from afar!
As far as aquariums are concerned, I know that there is one in Varna, Bulgaria, but never been there.
When it comes to Morocco, the only aquarium that I can think of is the one located in Morocco Mall, in Casablanca. It’s an aquarium equipped with an elevator, you pay in order to get in and make a tour that lasts few minutes, the time to get to the second floor.
I’m sharing with you a photo of this same aquarium with an elevator in the middle.