This Octopus Skull Door Knocker is that perfect addition to your home decor. This cold cast resin and metal door knocker is finely hand painted with bronze/gold painted details. This would be the perfect fit for a nautical or skull themed home or office. There are around 300 of species of octopus around. The octopus has a soft body with eight arms and a cephalopod beak. Octopuses are the most intelligent and developmentally diverse of all the invertebrates. The door knocker comes with mounting hardware.