Octopuses have a unique defense mechanism where they can detach an arm to distract a predator and escape. The detached arm can writhe and squirm, confusing the predator and allowing the octopus to escape.
This remarkable ability is made possible by the octopus's highly distributed brain, which allows it to control each arm independently. This means that even if an arm is detached, the octopus can still control the other arms and make decisions. It's like having a backup plan built right into your body!