Over the course of his twenty-five years studying octopuses, Scheel has witnessed a change in what we know and are able to discover about octopus physiology and behavior--even an octopus's inner life. Here he explores amazing new scientific developments, weaving accounts of his own research, and surprising encounters, with stories and legends of Indigenous peoples that illuminate our relationship with these creatures across centuries. In doing so, he reveals a deep affinity between humans and even the most unusual and unique undersea dwellers.