The swimmer noticed that a Great White Shark was underneath him, but so did the dolphins.   Adam Walker, a British swimmer, has accomplished a ton of these swims over the years. English Channel, Gibraltar Straits, Catalina Channel, Molokai Strait and Tsugaru Strait. This video was done in the Cook Strait.

Apparently the dolphins noticed that the shark was stalking him, so they swam with Walker for more than an hour to keep him safe until the shark swam away.

Walker swims for the dolphins and whales. It is the Whale and Dolphin Conservation charity.

Click on links provided for more information, photos and how to donate.