Video by @bertiegregory.
A 12ft wide oceanic manta ray comes blasting out of the blue with a fishy entourage. Last July I was lucky enough to swim with these incredible creatures as they aggregated off the coast of the Yucatan peninsula, Mexico. Watch how the baitfish use the manta's enormous body as a shield from aerial predators, allowing them to feed safely near the surface. Shot for @natgeo and @stevewinterphoto. Follow @bertiegregory for more videos of these giants!