Octopuses are one of the most intelligent animals on this planet with one study suggesting, they’re actually from another planet. They’re a member of the Cephalopod family which include Squids and Cuttlefish. These animals are excellent communicators changing the chromatophores (and the texture) in/of their skin to indicate emotion: white = fear, read= anger, etc. (They’re also amazing at camouflaging themselves.) Until now, scientists have thought that dreaming is a mammalian leftover from our lizard brains, but I’m not sure that Octopus follow the same lineage. That said, I am not a evolutionary biologist. Enjoy!