The Octopus is acephalopod, this family contains octopuses, squid and cuttlefish. They are found in all size ranges and will have eight arms with suckers on the underside. Octopus have the ability to camouflage their body color depending on their environment and mood. They can orchestrate their pliable body’s to fit into any small area. All openings in the aquarium must be sealed at all times. They are very intelligent predators, using their small beaked mouth to crush and eat small crustaceans.