Jellyfish and Sea Anemones Sleep Like Humans Despite Lacking Brains
Lead Researchers report that the upside-down jellyfish Cassiopea andromeda and the starlet sea anemone Nematostella vectensis enter prolonged, regular sleep-like states despite lacking centralized brains. Field observations in Key Largo, Florida, and controlled laboratory tests show Cassiopea rests roughly eight hours per day, mostly at night with a short midday nap, while Nematostella spends about … Read more