Octopus evolved a complex nervous system capable of intelligent behavior and perhaps of consciousness. It is argued e.g. by https://en.m.wikipedia.org/wiki/Other_Minds:_The_Octopus,_the_Sea,_and_the_Deep_Origins_of_Consciousness that this happened independently from the evolution of vertebrate nervous systems, given that our common ancestor was likely a very simple life form. Therefore octopus physiology may help shed light on consciousness. Market close will be extended until the hard problem of consciousness is solved.