Do octopuses dream? Maybe. But they definitely change colors while they sleep
CNN
Shifts in color, behavior and movement are evidence of a sleep cycle in octopuses, Brazilian scientists say, with the octopus switching between active and quiet sleep just as humans switch between deep sleep and REM sleep.
Moments later it begins to change color -- a mesmerizing shift between burnt orange and rust red. Its eyes, muscles and sucker pads twitching as if it may be experiencing a particularly vivid dream. Brazilian scientists say the shifts in color, behavior and movement are evidence of a sleep cycle -- with the octopus switching between active and quiet sleep just as humans switch between deep sleep and REM sleep -- named for the rapid eye movements we experience in this state.
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