Sleeping Octopuses May Have Dreams, But They're Probably Brief
Octopuses have an "active" phase of sleep, the kind that might involve dreaming, but they probably don't have long, complicated dreams like people do.
Octopuses have alternating periods of "quiet" and "active" sleep that make their rest similar to that of mammals, despite being separated by more than 500 million years of evolution.
During their active periods of sleep, octopuses' skin color changes and their bodies twitch, according to a in the journal , and they might even have short
