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Abstract
Cassiopea andromeda and Nematostella vectensis sleep about one-third of the day, similar to humans.
- Light and homeostasis primarily drove sleep in Cassiopea andromeda, which exhibited nocturnal sleep and midday naps.
- Sleep in Nematostella vectensis was regulated by both the circadian clock and homeostatic processes, with increased sleep observed at dawn.
- Melatonin promoted sleep in both species according to their specific sleep patterns.
- Sleep deprivation, ultraviolet radiation, and mutagens were associated with increased neuronal DNA damage and sleep pressure.
- Spontaneous and induced sleep appeared to support genome stability in both types of cnidarians.
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