Octopus quiz: Are you a sucker for cephalopod science?

Octopuses are a useful reminder that complex life can be organized in very different ways. Without a spine, their anatomy deviates greatly from the body plans that many people are familiar with. They are classified as cephalopodsa class of animals that includes squid, nautilus, and cuttlefish.

Octopuses can quickly change the color and the texture of their skin, manipulate objects with remarkable dexterity, and navigate environments that require both flexibility and control. Scientists study these traits because they offer insight into the evolution of perception, movement and problem solving in invertebrates.