Octopus mantle

Octopus mantle (Tremoctopus violaceus)

These animals look very contrast with normal octopus. As if these animals come from another planet who jumped into the sea and like to live there. Female animals 40,000 times heavier than the male. Males only have a length of 2.4 cm, while females, with a length of more than 2 meters. If you feel threatened, the female can increase the membrane that coats of arms so it looks bigger.