In early summer 2004, off the northern coast of the North Island of New Zealand, four swimmers were suddenly surrounded by a pod of bottlenose dolphins herding them into a tight circle. The dolphins were agitated, flapping at the water, and they continuously circled the swimmers, keeping them close together for over half an hour. A lifeguard patrolling in a boat nearby saw the commotion and dove in with the swimmers to find out what was happening. While under water, he saw a great white shark, now swimming away, beneath the swimmers. Presumably, the arrival of his patrol boat had scared the shark off, but it was the.
