Dolphins and sharks prey on a school of mackerel off the | Pic

	Dolphins and sharks prey on a school of mackerel off the Azores
	By Monica on Wed Feb 6 2013

Dolphins and sharks prey on a school of mackerel off the

Gear | Pic

British photographer Christopher Swann captures the underwater scene that thousands of fish swarm into a huge shimmering ball to make a last desperate play for survival against an onslaught of dolphins and sharks off the coast of the Azores in the Atlantic Ocean.