Octopus is almost always associated with being scary and ginormous! Well, they are but I didn’t know a baby octopus can be as small as to cling to your fingertip for its life.
Here are some basic facts about octopuses: 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 vestigial 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. (via Wikipedia)