Pic by Nan Hauser / Caters - (Pictured: Humpback whale pushes Nan Hauser around in the water, protecting her from shark.) - This is the heart-stopping moment when a giant, 50,000-pound humpback whale took it upon itself to push an unsuspecting snorkeler through the water, looking to protect her from a nearby SHARK. The stunning video and images Nan Hauser and her team were able to capture - including point-of-view footage - show how the whale pushed whale biologist Nan with his head and his mouth, tucked her under its pectoral fin - even lifted the biologist out of the water on one occasion. The moment, Nan, 63, said, is perhaps proof of whales intuitive nature to protect other species of animal - including humans - something she believes has never been captured on film, and intuition the biologist compared to firemen being willing to rush into a house on fire to help save the lives of those they do not know. - SEE CATERS COPY

The moment that a 50,000-pound humpback whale pushed her away from snorkeller to safety from a 15ft tiger shark was captured on camera. 
Biologist Nan Hauser swimming off the coast of Rarotonga, in the Cook Islands, when the giant creature swam in to prevent a “potentially deadly” attack. 
She said the encounter may be proof of a whale’s intuitive nature to protect other species, including humans.
She believes this has never been captured on video before and could be the first ever documented case of a humpback whale guarding a human from a shark. 
The giant whale tucked the 63-year-old,  under its pectoral fin and pushed her along with his head and mouth for around 10 minutes, she said.
She later realised that the 15-foot tiger shark was nearby, that the whale was steering her away from.  She had initially thought it was another whale until she realised it was moving its tail from side to side rather than up and down, she said.
“I’ve spent the past 28 years …