Have dolpins rescued human beings?

Dolphins are the only known wild animals that will come to the rescue of a human being. In the OPS film David Rastovich, probably the best-known free surfer in the world, tells how he was rescued from a shark attack by a bottlenose dolphin. On a dive trip to Rangiroa in Polynesia, a pod of resident dolphins playing in the deep blue around director Louie Psihoyos left suddenly to attack and push away an approaching large great hammerhead shark.