An octopus brain, depending on the species and how you count them, has as many as 50 to 75 different lobes. And most of an octopus’s neurons aren’t even in the brain but are in the arms. These may be adaptations for the sort of extreme multitasking an octopus must undertake: to coordinate all those arms; to change color and shape; to learn, think, decide, and remember—while at the same time processing the flood of taste and touch information pouring in from every inch of skin, as well as making sense of the cacophony of visual images offered by the well-developed, almost humanlike eyes.
