Ping
Yes, I saw this one time at Asilomar during a math teacher’s conference. the wet sand also glowed after you walked over it so the your prints were glowing in the sand. The waves would flash like the picture when the wave broke.
These photo cretters let their light out when they are disturbed.
Thanks, Nick. I’ve always wanted to see this, but can’t make it this time, though. We are on an Alaskan cruise — just left Seattle a couple hours ago. No bioluminescence here (yet).