Red Tide Turns Surf Blue

A red tide turned San Diego's coastal waters a bright shade of blue this week. The phenomenon, created by phytoplankton through a process called bioluminescence, is unpredictable. But when photographers hear a red tide is occurring, they flock to the beach to catch a glimpse. Here are some photos they captured of bioluminescence on May 29 and 30 on shorelines from Solana Beach to Torrey Pines State Beach.

Thanks San Diego NBC 7.