THE JUVENILE SEA SQUIRT WANDERS THROUGH THE SEA SEARCHING FOR A SUITABLE ROCK OR HUNK OF CORAL TO CLING TO AND MAKE ITS HOME FOR LIFE. FOR THIS TASK, IT HAS A RUDIMENTARY NERVOUS SYSTEM. WHEN IT FINDS ITS SPOT AND TAKES ROOT, IT DOESN'T NEED ITS BRAIN ANYMORE SO IT EATS IT! (IT'S RATHER LIKE GETTING TENURE) (Daniel Dennett)