A sand tiger shark in an aquarium at Baotou Ocean World, the largest aquarium in the Inner Mongolia autonomous region, Aug 29. Two sand tiger sharks were brought to the aquarium on Aug 28, transported from New York, United States. The sand tiger shark is a species of shark that inhabits subtropical and temperate waters worldwide. It is the most widely kept large shark in public aquariums owing to its ability to thrive in captivity. [Photo/baotounews.com.cn]