State biologists will start using science instead of speculation Monday to help explain why tens of thousands of jellyfish washed ashore on Ocean Beach over the weekend.
Beach goers said they were shocked to find the wobbly creatures on the shoreline early Saturday morning. The jellyfish stretched about three miles from Pacheco to Lawton Streets and made the beach appear to be covered in cobblestone.
Most of the creatures were swept back out to sea with Saturday night's high tide, but several hundred still remain.
A park service biologist will investigate the jellyfish and report his theories later this week.
Ocean Beach was the only one affected by the onslaught.