Cuttlefish change the patterns on their body for courtship rituals, when they eat a snack, and most famously when they want to blend in. How they change their skin patterns may tell us something about how they see the world, says Duke biologist Sarah Zylinski. Her work suggests that when cuttlefish see incomplete shapes, they fill in the visual blanks—much like humans do. Can’t get enough saltwater camouflage? Watch: “Where’s The Octopus?”