A question for any marine biologists or lovers of strange, aquatic lifeforms: what is this thing?

This slimy jelly (?) was spotted at low tide during a recent trip to Cannon Beach. It was about the size of a marble and looked like either: a) a mystical, long lost totem of an ancient civilization, b) candy of the future or c) something not safe to poke with my finger.

Any clue? Anybody?

Labels: science