Octopus n. : A genus of eight-armed cephalopods, including numerous species, some of them of large size. See Devilfish,

Example:
What would an Octopus with a monocle and a tophat do in its natural environment?

Taxonomy
octopuses, species, the octopus, octopodes, octopi, Family, cephalopods, two arms, predators, defense, limbs, suborder, body, cloud, squid, cuttlefish, unhatched eggs, larval.

Defination from the web:
Article examines the eight-armed cephalopod including its physiology, intelligence, sensation, and classification.