Here is a design of a purple baby Octopus! The octopus is a cephalopod mollusc in the order Octopoda. Octopuses have two eyes and four pairs of arms, and like other cephalopods they are bilaterally symmetric. An octopus has a hard beak, with its mouth at the center point of the arms. Octopuses have no internal or external skeleton (although some species have a vestigal remnant of a shell inside their mantle,) allowing them to squeeze through tight places. Octopuses are among the most intelligent and behaviorally flexible of all invertebrates.