A red tide off the coast of San Diego is providing night beachgoers with a stunning, yet somewhat eerie bioluminescence display.
Southern California's beaches are not the only ones to experience the algae blooms, which are considered harmful, due to toxins produced by the bioluminescent organisms.
The last time the shores of San Diego were lit up by a bioluminescence-producing red tide was in 2013.
Photographers in the San Diego area have also been flocking to the beaches there to catch the bioluminescent display on camera.
"It kind of looked like the color of a light saber", said Bay.
"The water contains dense numbers of dinoflagellates especially Ceratium falcatiforme and Lingulodinium polyedra, As L. polyedra (formerly Gonyaulax polyedra), which is well known for its bioluminescent displays", Latz, a bioluminescence expert at the University of California-San Diego's Scripps Institution of Oceanography, explained what happens.
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"It's this bright electrical blue color and it's attractive", Jami Leslie Feldman, owner of Underwater Paparazzi, told the news station.
"I was thinking, this is SoCal's equivalent of a Northern Lights", said Bay.
As an underwater photographer, Feldman says she's seen the red tide in a dive.
Latz added that, "We can't predict when these things occur, we don't know how long they will last, when they'll be here, and we really don't understand the dynamics".
"This bloom, like many HABs, is caused by microscopic algae that produce toxins that kill fish and make shellfish risky to eat".