Octopus Small 320×317 Medium 640×633 Large 1024×1013 Download TIFF Original 3000×2969 | (3.4 MB) Description Octopus, a mollusk related to the squid. It has eight arms with suckers, arranged around a central soft, baggy body. Keywords Cephalopoda, octopus, squid Galleries Squid, Octopus, and Nautilus Source: Chandler B. Beach The New Student's Reference Work for Teachers Students and Families (Chicago, IL: F. E. Compton and Company, 1909)