- Sleeping Octopuses May Have Dreams, But They're Probably Brief WJSU
- Do octopuses dream of 8-armed sheep? New study hints at human-like sleep cycle in cephalopods Livescience.com
- Octopuses, like humans, sleep in two stages Science Magazine
- Octopus sleep includes a frenzied, colorful, ‘active’ stage Science News Magazine
- Octopuses may be able to dream and change colour when sleeping New Scientist
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