Photos posted on social media are capturing the return of the red tide and beautiful bioluminescence tide phenomenon along San Diego County's coastline this month.
PHOTOS: Bioluminescent tide along San Diego's coast
Bioluminescent off the coast of San Diego
Bioluminescence tide captured along San Diego's coast
PHOTOS: Bioluminescent tide along San Diego's coast
The surf is sparkling with neon light. Here's where to see
Glowing bioluminescent waves return to Southern California coast
Incredible' bioluminescence gives California surf an eerie blue
The ocean blue: Bioluminescence glows along the La Jolla coast
PHOTOS: Bioluminescent tide along San Diego's coast
Bioluminescence is Back in San Diego. How to See the Red Tide and
Surf's lighted up at San Diego beaches
Glittering Tides: Where to Spot Bioluminescence in the Bay Area