You’re not going to get anything substantive today, I fear, for Professor Ceiling Cat (Emeritus) is attending to Cat Stuff. But here’s a “spot the. . . ” post, the object being a crab. This was sent in by Leo Glenn, who said this:
Here’s a Spot the Crab photo, from a recent trip to coastal Maine. I thought it was too easy, and was surprised that so many of my friends couldn’t find it. I’m confident your eagle-eyed readers will make short work of it. The photo was taken at low tide at Tidal Falls Preserve, in Sullivan, Maine.
Click to enlarge; answer soon.

Good one!
Yes; good one but saw it instantly (literally).
It looks frightened.
Pretty sure I spotted it, but it’s early in the game so I won’t say where.
Crab or no crab, that’s a very nice picture, Leo. Very satisfying to look at!
Thanks!
I found it, but not instantly. Cute little fellow.
I can’t find it. I think I’m not OCD enough.
I think it’s just right of center.
Late to the party. That is a good one. Would make a hell of a 4000 piece puzzle.
Yes it would!
Great fun–a good challenge but eventually findable. I had to zoom in, though. (I’m on a Surface Pro…)
I seem to remember there are web sites that will convert photos into someK piece puzzles.