Fishermen told me that they use an olive branch as bait to hunt octopuses. But no one has ever heard of vegetarians among octopuses. It’s just that the leaves of the olive tree below have a light shade, like the body of many fish. You can learn about this technique of catching octopuses from literary sources of the 2nd–3rd centuries BC. The octopus's vision is complex, approaching that of mammals and is undoubtedly the main sense organ. It is not surprising that an optical illusion can mislead him. In general, octopuses have no more bloodthirsty feelings for the human race than for a tree branch with which they do not know what to do. But no less. I bet that if suddenly a small octopus of our seas during a hunt is lucky enough to accidentally catch a person by the leg, he will be as scared as a fisherman from the Parisian embankment if a blue shark bites his bait.