 the capacity to recognise yourself in the mirror. Humans can do it, dolphins can do it, chimpanzees can do it. There's a very small list of animals that have passed this mirror test. But about four years ago, scientists published a paper which showed that a little tiny fish, which is called a cleaner wrasse, which is one of those fish that live on, they live on coral reefs and they're about as long as your finger. And you'll see them because they maintain those cleaning stations and the fish come to them and they