I dived the Dubai Mall Aquarium and it was OK. I was dissappointed in the quality of the staff photographs as she stood so far away from the glass that in my "great dive" photos are the store front's relection. I second that the Atlantis's aquarium is very much smaller. I did my Rescue at the Atlantis and dived with them a couple of other times and the diving in Dubai had about 1-2 meters vis. By far from what I have experienced the best diving in UAE is in Fujairah with About Us Divers Down Fujairah UAE - Divers Down UAE - SCUBA Diving on the East Coast of the UAE in the Miramar Hotel.