While action cameras are small, once you add on underwater housings and other attachments they tend to bulk up a little bit. The Octospot, is an underwater action camera that solves that problem and more. Rated to function at a depth of 200m without an external case, which is 5x deeper than the GoPro Hero 4 Black. The Octospot makes capturing photo and video a lot easier. The Octospot also automatically adjusts white balance according to depth.
Check out the Kickstarter for more details.