The ocean is probably the last thing people think of when they visit the dry desert of Las Vegas, but the Shark Reef at Mandalay Bay is changing that.
  Housing more than 1,200 species of marine life including sharks, exotic fresh and saltwater fish, a 300-pound sea turtle and much more, Shark Reef offers the aquatic experience of a lifetime.
  Since the sharks at the Shark Reef are fed on a daily basis, the surrounding animals are in no danger. Sharks are fed three times a week, which is more than they would probably eat in the wild. In fact, the half-inch Blue Damsel, the tiniest fish at the Shark Reef, shares the same tank with these gigantic creatures.
  When divers swim in to clean these tanks, they wear a stainless steel mesh, similar to what knights wore long ago. The metal helps keep the animals away so the humans don't look like food.