Are All Octopus Invertebrates?

Are All Octopus Invertebrates? Are all octopus invertebrates? The octopus is an invertebrate, meaning that it does not have a backbone. Octopuses, squid, cuttlefish, and nautiluses make up the cephalopod group (cephalopoda, from the Latin for “head-foot”). Is octopus an invertebrate animal? Octopuses (or octopi, if you prefer) are cephalopods, invertebrates that also include squid