Eric Walker added Grimpoteuthis to Opisthoteuthidae, and added Opisthoteuthidae to Octopoda

Eric Walker added Octopoda, Nautiloidea and Decapodiformes and a number of links to Cephalopoda, and added Cephalopoda to Mollusca

Eric Walker added Octopus to Octopodidae, and added Octopodidae to Octopoda

Eric Walker added Opisthoteuthidae and Octopodidae to Octopoda, and added Octopoda to Cephalopoda