Underwater Cave, Bahamas Photograph by Wes C. The Cascade Room, 80 feet meters) beneath the surface, leads divers deeper into Dan's Cave on Abaco Island. Nearly seven miles kilometers) of the cave have been explored since the
A pair of divers explore the wreck of the Giannis D (originally Shoyo Maru) on the Abu Nuhas reef, Strait of Gubal, Red Sea, Egypt. By British photographer Alex Mustard. He's travelled the world snapping pictures of wrecked ships lying on the sea bed.
attribution) Coral reefs swarm with brilliant colored fish, starfish, giant clams and sea slugs. They are not only beautiful to look at; but they are home to thousands of other species. Coral reefs can be large or small and are some of
Emperor penguins are Olympian swimmers, capable of diving to feet and remaining underwater 20 minutes on a single breath. "I was mesmerized by their beautiful bubble trails," says Nicklen, who braved water to capture these images for National Geographic.