Or is it jetsam? And how do you keep that straight, anyway?

The cowrie shell is from Paradise Cove. You don't see them much any more, not since the last El Nino. I found the blue sea glass on Broad Beach. You don't see that any more either, not since the residents tore up the shoreline with tractors a few years ago, to keep you off their beach. The little sea star was a gift.