Bioluminescence from a red tide lights up the waves in a vibrant blue color in San Diego, Calif., in this photo posted to Instagram May 9, 2018. John Cunningham/ itsadogslife5/ Instagram ...

The bioluminescence is a phenomenon caused by flourishing algae blooms, also known as the "red tide." ...

The event known as red tide is back in San Diego and a local photographer is on the hunt for the perfect shot of bioluminescence.

Red tides are being spotted off the coast of San Diego, which means glowing bioluminescent waves may be coming back.

The red tide is back and it’s rolling what appears to be electric blue waves into parts of San Diego’s coastline. Here’s where bioluminescence has been spotted this week.

A pungent, fishy odor has been wafting through the air by Los Angeles' shore this week, an unfortunate consequence of beautiful bioluminescent algae.

The red tide is back and it's rolling what appears to be electric blue waves into parts of San Diego's coastline. Here's where bioluminescence has been spotted this week.

LOS ANGELES - The red tide has returned, and you know what that means - bioluminescent waves are lighting up the Southern California coast a glowing blue for the second time in 2024. Known ...

As most San Diegans probably know, bioluminescence is connected to an plankton bloom in the water known as a “red tide.” Underwater ‘Seahorse Hotel’ unveiled at Birch Aquarium ...