they are in the class cephalopoda, which also includes cuddlefish.
Cephalopoda
Cephalopoda, for example.
what
Cephalopoda
Class Cephalopoda
Class Cephalopoda
Rousseau Hayner Flower has written: 'The cephalopod order Discosorida' -- subject(s): Cephalopoda, Fossil, Discosorida, Fossil Cephalopoda 'Silurian cephalopods of James Bay Lowland' -- subject(s): Cephalopoda, Fossil, Fossil Cephalopoda, Narthecoceratidae, Paleontology 'The nautiloid order Ellesmeroceratida (Cephalopoda)' -- subject(s): Ellesmeroceratida 'Part I--New American Wutinoceratidae with review of Actinoceroid occurrences in Eastern Hemisphere and Part II--Some Whiterock and Chazy Endoceroids' -- subject(s): Paleontology, Endoceratoidea, Wutinoceratidae, Actinocerida 'Cambrian cephalopods' -- subject(s): Cephalopoda, Fossil, Fossil Cephalopoda, Paleontology 'Studies of paleozoic nautiloidea i-vii' -- subject(s): Fossil Nautiloidea, Nautiloidea, Fossil, Paleontology 'The first great expansion of the Actinoceroids' -- subject(s): Cephalopoda, Fossil, Fossil Cephalopoda, Paleontology 'Part I: Botryceras, a remarkable nautiloid from the Second Value of New Mexico' -- subject(s): Cephalopoda, Fossil, Fossil Cephalopoda
Vertebrata
Victor Uhlig has written: 'Die Cephalopodenfauna der Wernsdorfer Schichten' -- subject(s): Cephalopoda, Fossil, Fossil Cephalopoda
No, octopuses and cuttlefish are two different orders, Octopoda and Sepiida, respectively. However, they are both of the class Cephalopoda, which also includes squids. To put it simply, they are two different creatures within the same class.
Cephalopoda