One of the most disquieting things about lobster – a creature that urinates through its face, I have been told, and is therefore at a pretty rarified level of disquiet already – is that beneath the shell they seem to be all lobster. Maybe you have watched lobster being poached in butter on a cookery show. The claw is removed. The shell of the claw is cracked open. And inside, a perfect padded claw-shape of lobster, a novelty lobster claw cushion of meat. And nothing else! How do these things work? How do they get about and skitter around the seafloor? How can they even master the effort required to urinate through their own faces (I have only been told this, I might be wrong) when they’re just meat wandering around inside a shell?