This grasshopper's camoflaged body blended in extremely well with his surroundings of small gravel and sand. Perhaps consequently, he seemed very confident. Indeed, his head tilt suggests that a sarcastic retort is coming. Nevertheless, he zipped off a few seconds after this image was made.
This is a close view of the "head" of a box jelly. They seem surprisingly agile and purposeful as they trail their tentacles through twisty passages. Their insides look like wrinkled sheets of wax paper or plastic. Quite a few of them have been showing up at Refugion Beach lately, in the shallows when the surf is low.
This looks like a bell medusa (Polyorchis penicillatus) in Daniel Gotshall's "Guide to Marine Invertebrates: Aaska to Baja". It's thus a Hydrozoan, and so more related to hydroids and similar creatures, than to other things that look like jellyfish, which are Scyphozoans.