You can often tell why the Chinese government has kept a tight lid on tort actions in the country. These shoppers got an unexpected interactive experience with sharks in an aquarium in a Shanghai shopping center.
We have previously seen other tanks in shopping malls with unstable or defective structures. The situation in Dubai was only slightly better.
The claims for negligence would be obvious in the U.S. However, there might also be negligent infliction of emotional distress and even the potential for strict liability for wild animals (though the injuries in China was due to the water not the sharks — which died in the accident).