Sand tiger sharks, also known as gray nurse sharks ... Individuals range in size from 6.5 to 10.5 feet in length. Sand tigers are the only shark known to come to the surface and gulp air.

OARAI, Ibaraki Prefecture--A sand tiger shark was born at the Aqua World Ibaraki Prefectural Oarai Aquarium here, the first successful breeding of the species in Japan. Only four other aquariums ...