Octopuses are highly intelligent creatures. They can complete puzzles, untie knots, open jars, toddler proof cases and are expert escape artists from aquariums, their intelligence stems from a completely unrelated path to human intelligence which makes them true aliens. Like all marine animals, they are seriously threatened by pollution, overfishing and habitat loss, the Coral Reefs around the world are under threat due to factors including global warming and acidification of seawater.