Watch as this hungry sea turtle snacks on a jellyfish, slurping its tentacles like spaghetti.

Draped in a vibrant mix of soft corals and sponges, patrolled by an array of pelagic predators, home to some fish species found nowhere else on earth, and the resting place of world-class wrecks, the reefs and pinnacles of the Red Sea are the stuff of legend.

Why did UNESCO choose Cocos Island National Park as a World Heritage Site? It is the only island in the tropical eastern Pacific, and it provides critical marine habitats — deep waters pumped with nutrients from life-giving currents — for large pelagic fish, including the planet’s biggest — the whale shark — as well as schools of hammerhead sharks, yellowfin tuna and manta rays.

Storms keep getting stronger. Their aftermath gets worse. But the question stays the same: Why aren’t we prepared?

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Nearest Point is a diverse, kaleidoscopic reef.

Drifting in the cobalt blue waters of Molasses Reef a diver notices something odd: On the underside of the Cheeca View (the dive boat he'd just been relaxing on), the letters HD had been painted in white on either side of the hull.

From symbiosis to mating to mouthbrooding, here are some of the coolest animal behavior photos from our 2017 Through Your Lens Photo Contest.

Henauer first caught our attention when he took home 2nd place in the wide-angle category of the 2017 *Scuba Diving* magazine photo contest.