It's probably just millions of angry jellyfish that eat surfers.

"The phytoplankton in this red tide off a California beach are bioluminescent. Their cells produce a chemical reaction that creates a soft, blue-green glow. It's basically the same thing that makes lightning bugs light." http://boingboing.net/2011/10/03/surfing-the-red-tide.html

No no no. It's lightsharks.

I surf fished during this red tide, you could see the fish darting away when you spooked them. And the stingrays.

Also the color in the video is wrong, the light was green. I actually mistook it for a traffic signal reflection as the sun was setting.

Yeah I want to dock stars for shitty music but it's still pretty awesome muted