Wow, a friend posted this to my Facebook wall wanting to know if I knew what it is. I have to confess, I have no idea. It looks like some kind of shrimp or crab that is camouflaged to look like seaweed. Or perhaps it has some kind of seaweed growing on its shell?
Check out this video and let me know if any of you can identify this awesomely odd species.
Here's a screenshot from the video: