A Blacktip Reef Shark Swims Overhead, Fakarava, French Polynesia
Photo by Thomas Vignaud
To capture this image of a blacktip reef shark from below, photographer and shark scientist Thomas Vignaud had to situate himself in just the right place. "Free-diving allowed me to lay on the sand without moving and without bubbles until a shark passed just a meter above me, allowing me to take this shot," he said.
See more of Vignaud's photography on his website.