Jelly (fish) anyone?

This is not a jelly that failed to set but a jellyfish left high, not not yet dry, by the tide. I don't know enough about them to know if it is still alive and will get 'lift off' when the tide returns but I don't think I would fancy meeting it out swimming.
Thanks for the new subs, and sorry when I fail to comment on blips. Our internet connection is always bad, and worse than usual at present. If I had a pound for the number of times it has crashed mid-blipping....