A conscious octopus changes its color and patterning on a dime to fool prey or escape danger, reports Atlas Obscura.

According to Mather, one of the theories behind sleep is for an organism to rehearse and solidify traces in the brain from experiences of the previous day. Octopus brains do the same kind of thing. “If this central experience is ‘dreaming,’ and our dreaming is often linked to what has happened before, then octopuses might dream,” she says.