Cephalopods (pronounced ‘sef-fo-la-pod’) make up that incredible group of boneless, color-changing animals that include octopus, squid, cuttlefish, and nautilus.
Even though they are all cool, let's really focus on the octopus. . . .In particular, octopus intelligence. Why? Because there are far more incredible, jaw-dropping feats the octopus can do besides fitting through small holes (like this guy)