We found this on a beach in North Devon, UK. I've never seen anything like it.
There's a yellowy-ball in the middle with 5 pointed shells attached to it, each of which seems to have a single "leg" coming out of the bottom. It almost looks like it's 5 separate creatures feeding on something, but they're pretty firmly attached. Perhaps it's some sort of egg-sac that they're growing from?
Does anyone know what this is?