This guy has some awesome pics and perspectives on waves. http://www.cnn.com/2015/04/28/travel/gallery/wave-photos-ray-collins/index.html
No problem. Guy gets some amazing shots most people never see. The lighting on most of them is really cool.
The pics make the wave look like a mountain made of water frozen for that moment. Use your imagination young one.
I've wondered the same thing. I have seen it in other pics and videos but am not sure what causes it. Very well could be Spongebob.