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Take a virtual tour of the SS Thistlegorm shipwreck in the Red Sea with The Thistlegorm Project's amazing 360 video and 3D images.

Jellyfish are exciting to see on any dive. Here are our favorite jellies from the 2017 Through Your Lens photo contest.

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This tiny device — about the size of a pickle — could change the future of purpose-driven diving.

A prehistoric wonder, with fossil beds dating back 33 million years, Devil’s Den is a great place to experience diving in inland Florida.

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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.

New wrecks have been sunk for divers to explore in the Bahamas, Bermuda and the Mid-Atlantic U.S.

Before it disappears again — and this time, for good — nine tourists will visit the *Titanic* for the price of a first-class ticket on the 1912 voyage of the famously “unsinkable” ship.

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A short film by This Is Alabama shows an underwater forest that’s been preserved for 50,000 years.