33. The giant Pacific octopus is not an animal you would want to mess with in the ocean — but it is an introvert.
This species holds the record for the most gigantic octopus in the world. The largest ever recorded weighed close to a whopping 600 pounds. The giant Pacific octopus belongs to the cephalopod family, closely related to squid and nautili. Each of its eight arms has two rows of suckers, allowing it to grab onto anything and everything to determine whether it’s food or not. Their diet is also pretty large, including shrimp, snails, clams, lobsters, crabs, scallops, and even other octopuses.
Octopuses are actually very curious and are considered one of the smartest animals in the world. Some have been known to be able to open bottles on their own, without being shown how. The giant Pacific octopus tends to be introverted and, like true introverts, exhibit a preference for staying in their dens unless enticed to exit by the possibility of a meal. Like other cephalopods, such as squid and cuttlefish, they are masters of camouflage. Their skin is covered with small colored cells. Expansion and contraction of these cells cause the color to change very quickly.