Meet your instructor at your chosen tour time at the Dubai Aquarium and Underwater Zoo in the Dubai Mall. Tours are available on the half hour between 12pm and 3pm, 4:30pm and 7:30pm.
Get a short orientation and slip on your snorkel gear, then climb into the metal and Plexiglas dive cage. Once in the 2,641,720-gallon (10,000,000-liter) tank, you'll get views of marine animals from more than 70 different species, including 300 sharks and rays and the largest collection of Sand Tiger sharks in the world. You'll also see giant groupers, Cow nose rays, fan-tail rays, and Grey reef sharks.
After 30 minutes, climb out and towel off. Your tour includes admission to the Underwater Zoo, which you are welcome to explore at your leisure.