A whale shark swims in the Pole Aquarium of the Dalian Laohutan Ocean Park in Dalian of northeast China's Liaoning Province, on June 18, 2009. The 4.24-meter-long female whale shark, one of the first batch of its kind imported by Chinese mainland, arrived at the Pole Aquarium on June 17. [Xinhua]

A whale shark swims in the Pole Aquarium of the Dalian Laohutan Ocean Park in Dalian of northeast China's Liaoning Province, on June 18, 2009. [Xinhua]