Photographer Page

Andy Mann

National Geographic Explorer and marine biologist Jessica Cramp free dives among yellowfin goatfish in the lagoons of Rarotonga. The island the base for Sharks Pacific, a conservation project she founded to protect sharks and the people and places they rely on.

Bull sharks, which tend to hang out near coastal areas, can also tolerate fresh water.

The American alligator, Alligator mississippiensis, is a living archosaur that descended from ancient reptile relatives.

Caribbean reef sharks, once the most plentiful reef shark in the region, have declined in recent decades.

A snorkeler rises to the surface of the Tasman Sea. “For me, nothing says summer quite like the ocean does—bright sun above, blue water below, a watery landscape teeming with life,” says photographer Andy Mann.

In 2013 Paul Rose (above, right) led a Pristine Seas expedition to the Franz Josef Land archipelago, one of the most remote places in the world.

Jessica Cramp free dives off Rarotonga, the largest of the Cook Islands.