Hungry!

Barnacles have their quirks. The large thatched acorn barnacle shuts down tightly when the tide goes out. As it comes back in, and the first waves splash them, they begin to open, tentatively. If I come too close, they see my shadow and slam their doors shut again.

Not so the little common acorn. I had them out of the tank tonight while I scrubbed the walls, and as long as they were damp, they kept on trying to catch something to eat. And they didn't mind me moving the shell they grew on, nor even the camera's flash. They couldn't quite spread their nets as far as they do underwater, but it wasn't for lack of trying.

Looks like mountain peaks, with green lava. Or tentacled Sasquatches.