The reflex to assign our morally wrong behaviour to the animal part in us is quite ironic. I just don't see jellyfish building concentration camps.
Yeah they just use their tentacles to catch prey and bring it into their body cavity, where they feed on and defecate out of the same opening. Maybe they don't because they lack the intellect to do so, not because they have any sense of morality.
It’s a defense mechanism. Something we like to tell to convince ourselves that we are not as bad as they are.