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Blue waves, illuminated by
bioluminescent algae, off Blacks Beach, La Jolla, California. The algae can chemically synthesise their own light, a process known as bioluminescencePhotograph: KC Alfred/Zuma Wire
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Spectators enjoy the display at Dockweiler state beach in Los Angeles, California
Photograph: Mark J Terrill/AP
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Blue waves near the Scripps Institute of Oceanography Pier, La Jolla Shores beach
Photograph: KC Alfred/Zuma Wire
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Waves glow blue in the distance beyond the lifeguard tower at Del Mar, California
Photograph: Gregory Bull/AP
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A lone night-time surfer rides through the glowing waves at Newport Beach, California
Photograph: Mark J Terrill/AP
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Blue waves crash on to Windansea beach at La Jolla
Photograph: KC Alfred/Zuma Wire
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Blue breakers crash on to Blacks Beach, La Jolla
Photograph: KC Alfred/Zuma Wire
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A lone surfer rides a blue wave at La Jolla Shores beach
Photograph: KC Alfred/Zuma Wire
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Spectators on a bridge enjoy the spectacle at Cardiff state beach, Encinitas, California
Photograph: Mike Blake/Reuters
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Algae glows in the crashing waves off the beach at Encinitas
Photograph: Mike Blake/Reuters
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Blue waves roll on to the sand by the pier at Manhattan Beach, California
Photograph: Valerie Macon/AFP
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Glowing waves roll on to La Jolla Shores beach
Photograph: KC Alfred/Zuma Wire
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