Dolphins prevent NZ shark attack
However, there have only been about 7 shark attacks in NZ over the last 100 years of something, so not something to be hugely concerned about.
Mind you, I do wonder why these attacks arent more common, given how helpless we are in water by comparison!
Amazing save by the dolphins though, quite incredible how they will protect humans in the water. Perhaps we should stop killing them in our fishing nets.