This article is about the order of cephalopod. Octopuses appear in mythology colossal red king crab legs wild caught 3 lb sea monsters like the Kraken of Norway and the Akkorokamui of the Ainu, and probably the Gorgon of ancient Greece.
Historically, the first plural to commonly appear in English language sources, in the early 19th century, is the latinate form “octopi”, followed by the English form “octopuses” in the latter half of the same century. The Hellenic plural is roughly contemporary in usage, although it is also the rarest. The head includes the mouth and brain. The skin consists of a thin outer epidermis with mucous cells and sensory cells, and a connective tissue dermis consisting largely of collagen fibres and various cells allowing colour change. The interior surfaces of the arms are covered with circular, adhesive suckers.