It's not what you don't know that kills you......

[doughishere]

https://np.reddit.com/r/pics/comments/47s9en/when_you_find_a_sandbar_in_the_middle_of_the_ocean/d0fdvgv?context=3

 

 

Image: http://i.dailymail.co.uk/i/pix/2015/07/25/13/2AD4B2E300000578-3174252-image-a-1_1437827072250.jpg

[Pelagic]

Call me skeptical,

 

 

They had a much higher percentage bubbles to seawater than you'd find naturally I'd think since surface action and currents would disperse the escaping gasses quite a bit and it was still difficult to sink their test boat.