Some briny deeps are brinier than others. The Atlantic Ocean has two huge "deserts" of extra-salty water, the result of little rainfall and lots of evaporation. Read More >>

The next time you're having a bit of a bad day, consider this: in a part of the Southern Ocean, sea snails are literally dissolving day by day, thanks to the increasingly high amounts of man-made acidification. Being a little late to that meeting beats being dissolved alive, eh? Read More >>

There's something about this animation that has me totally mesmerised. Like a lava lamp, but better. It's as if Earth has an invisible heart beat showing through the surface temperature of our oceans. Beautiful. Read More >>

After sinking, the RMS Titanic lay undisturbed beneath 12,000 feet of freezing North Atlantic water for years, but in 1985 its watery tomb was finally breached by another marquee vessel—the crown prince of HOVs. Read More >>

While it may not be able to reach the same seven-mile mark as James Cameron's deep-sea vessel, the Jiaolong manned submersible could provide far greater returns. Read More >>

Marine biologists have been recording the "signature" whistles of captive dolphins for decades but have never been sure of their function. However a new study suggests that these personalised calls are in fact the the cetacean equivalent of shaking hands and trading business cards. Read More >>

Australia's Great Barrier Reef is the largest natural coral formation on Earth and you'll soon be able to see it in all its glory—from your desk. Read More >>

No, this photo hasn't been 'shopped. You are looking at a specimen from a barely-known and even-more-rarely-seen group of "Supergiant" amphipods—crustaceans that grow twenty times the size of their relatives and can measure a foot or more in length. Read More >>

Dragging a body any distance is tough enough on land, much less while swimming. And the faster you land that person, the more likely you are to resuscitate him. Unfortunately, most conventional life-saving equipment is either slow moving, like kick-boards, or slow launching, like wave-runners. Hence, the Asap Water Rescue Craft. Read More >>

The camera you see here just spent a year at the bottom of Deep Bay but is now home thanks to the efforts of a nature photographer and the power of social networks. Here's how he did it. Read More >>

As NASA prepares to launch the Curiosity rover to explore Mars at the end of the month, a small fleet of Wave Gliders, autonomous sea-faring vehicles, have set sail on an equally audacious journey—swimming unassisted across of the Pacific Ocean. Read More >>

The English coast isn't exactly suitable for large-scale solar projects, but it does have plenty of another renewable energy source: waves. This device turns all that kinetic energy into a vast swath of electricity. Here's how. Read More >>

What are ten centimeters across, live 6 miles under water, and are incredibly toxic? The Xenophyophores of the Mariana Trench — the largest individual cells in existence. Read More >>