List of Animals that are Predict Never Sleep
- Pixabay/ Paxels
3. Fruit Flies
Lalat
- pixabay
Some insects sleep for extremely short periods. For instance, small percentages of female fruit flies (Drosophila melanogaster) were found to sleep for an average of 72 minutes per day, with one specimen found to sleep for only 4 minutes a day.
Counter to other laboratory experiments involving sleep deprivation, these flies experienced no deleterious effects and lived just as long as the control group. Other insects are known to sleep very little or to enter into a torpor state, which is similarly marked by lowered metabolism, body temperature, and alertness.
4. Jellyfish
Ubur-ubur surai singa (Cyanea capillata)
- Twitter @jellyfish_otd
Until recent studies demonstrated otherwise, it was thought that animals without a central nervous system, such as jellyfish (like Chrysaora fuscescens), either did not need it or were incapable of sleep.
However, it was shown that jellyfish do enter a sleep-like state at night. Their pulsations and responsiveness to basic stimuli dropped noticeably for an extended period, which at least gave the appearance of sleep. They certainly would not enter the same sort of deep trance that humans and other mammals do, but some kind of mental and physical recharge does seem to take place.
5. Bullfrogs
Daur hidup katak
- Pixabay
One experiment seemed to show that bullfrogs (Lithobates catesbeianus) did not sleep since they reacted to stimuli similarly at all times. However, this idea has been dispelled and replaced by the notion that they do snag intermittent moments of rest, though never sinking into a full, inattentive slumber.
Whatever the case, these observations still only cover their active months. Bullfrogs get thoroughly caught up on sleep during their hibernation season.
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