Dolphins save swimmers from shark
'Howes tried to drift away from the group, but two of the bigger dolphins herded him back just as he spotted a three-meter (nine feet) great white shark swimming towards the group.
"I just recoiled. It was only about 2 meters (6 feet) away from me, the water was crystal clear and it was as clear as the nose on my face," Howes said.
"They had corralled us up to protect us," he said.' (CNN.com article)