Octopus refers to an inveterate animal which belongs to the Phylum Mollusca. Octopi is used as a plural form of octopus. ‘Octopi’ is a mistaken plural of octopus.

Octopus and Jelly fish are both invertebrates. Octopus belongs to the group of cephalopods. Cephalopod means feet around the head. Jellyfish belongs to the Phylum Cnidaria and Class Scyphozoa. Both differ in...

Octopus and squid, both are aquatic animals belonging to the group of Cephalopods. Cephalopod means feet around the head. They both share many common features. However, they also differ in many attributes like...