Weird beach critters

We saw some pretty cool critters on the beach today. Must have been a storm somewhere to have them all wash up like that. We saw some puffer fish too. First pic is of a goose barnacle. It is seriously weird looking. Second pic is a bluebottle. Apparently it's multiple critters joined together. Weird. Then there is a violet snail. There were tons of them on the beach. They drift bottoms up in the ocean by blowing bubbles that harden and help them float. I have no idea what the last picture is of. So neat!