Diving at Henderson it is so easy to be fascinated by the sharks and other large fishes, that we risk missing entire little universes. This gallery shows animals that I photographed inside a single Pocillopora (cauliflower coral) head—the size of a watermelon. And this is only a sample. Many more creatures are too small to be seen by the human eye underwater, or hide deep inside the branches. No matter what scale we view things at, Henderson reefs are full of life.