This tiny octopus produces a venom times more toxic than cyanide. One single octopus produces enough to kill 26 adult humans. It flashes iridescent blue rings as warning when it is agitated.They're found in Australia.
Blanket Octopus: is 2 meters long with an enormous cape behind it. The octopus is the only animal immune to the stings of the man of war jellyfish. It can rip off the stingers of the jellyfish and use it as a whip.