Did You Know? *  More than 500 fish call The Atlantis Aquarium home. *  You can view the ruins of Atlantis in the Great Hall of The Forum Shops *   The Atlantis Aquarium is a 50,000-gallon marine environment. *  The temperature in the aquarium is a constant 78 degrees Fahrenheit--perfect for tropical species. *  The acrylic panels that make up the 50,000-gallon aquarium are four inches thick. *  The horseshoe-shaped environment is almost 100 feet long. *  The Atlantis Aquarium is 10 feet deep and the width varies from one foot to six feet. *  And yes, the divers are real.