7:25 PM: The photo is from Caroline, who spotted that on Lowman Beach and wonders what it is: “It’s humongous! And so amazing with the colors and textures.” She and other beachgoers have been keeping it wet while the tide rolls back in, but they’re wondering what it is. We don’t recognize it; tried Google Search By Image, and while it suggests possibly a jellyfish relative, no definitive ID via photos. Do YOU know what it is?
9:22 PM: Consensus in comments seems to be that it’s an upside-down lion’s-mane jellyfish, so we’ve updated the headline.