Eyewitness News viewer Patrick Coyne captured stunning footage of the neon waters off the Orange County city's coast.
The glowing blue hue is from bioluminescence, a semi-regular occurrence. It happens when tiny organisms such as plankton get stirred up and give off this light.
We saw a lot of it last spring, up and down the coast.
More recently, we've also seen the blue waves in Laguna Beach.
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