In the world's oceans, human divers are as mobile as a fish out of water. So, what, you think you're going to fend off an inquisitive shark or lascivious dolphin while holding a GoPro? Not likely, but that's where the Octomask comes in. Now anybody can be a modern Jacques Cousteau and keep their hands free for defending themselves under the sea.
The Octomask is exactly what it looks like -- a snorkelling mask with a GoPro mount situated mid-forehead. The genius of this head-mounted device, as opposed to hand-held underwater housings, is that it records whatever you're looking at automatically. Plus the GoPro mount is integrated into the mask itself rather than being adhesively affixed as the stock dive mount is. On the other hand, the Octomask is twice the price and won't work with an existing mask but the ability to grapple against the deadly, deadly Jaguar shark make it well worth the cost. [Amazon via Gadget Review]