Karen Wilkinson and Mike Petrich headed out to a tide pool with a UV flashlight at sunset during a recent low tide. They found a group of Sea Anemones shining with light. Karen wrote, “Things got weird on the edge of the Pacific last night! Scientists have found that the protein that helps Anemones light up also acts as a natural sunscreen. This protein allows Sea Anemones to protect their symbiotic algae, zooxanthellae, living in their tissues from harmful UV rays. The fluorescence we see may be a by-product of their natural sunscreen.”

I wondered if Karen and Mike had photographed bioluminescence but Bob Van Syoc wrote, “I’d call this fluorescence, which is a form of luminescence. The Anthopleura Anemones in Karen’s and Mike’s photos have absorbed light from their flashlight and are emitting a longer, lower energy wavelength of light that makes them ‘glow.’”

Aren't they beautiful? Thanks to Karen and Mike for allowing me to share their photos with you here.

The fog rolled in, as it is wont to do, and cooled things off quite a bit.