Amazing red tide
Red tide is a common name for a phenomenon also known as an algal bloom (large concentrations of aquatic microorganisms), an event in which estuarine, marine, or fresh water algae accumulate rapidly in the water column and results in discoloration of the surface water. It is usually found in coastal areas.
The video was shot at Moonlight Beach in Encinitas, Calif & North Ponto Beach in Carlsbad, Calif.
The bright blue color is caused by bioluminescence from an algae bloom. The algae is red in the day, hence the name Red Tide, but glows a bright blue at night when agitated, such as when a wave breaks. It's a really awesome sight to see.... when people swim in the water, the entire water around them glows blue. Truly amazing!