Chinmaya IAS Academy – Current Affairs Chinmaya IAS Academy – Current Affairs
Context:
Aquatic animals and creatures in the wild, constantly alert to threats, have evolved unique ways to rest and recharge whenever possible.
| Sr. No | Creature | Sleeping Pattern |
| 1 | Dolphins | Dolphins rest by shutting down one half of their brain while the other half stays alert for danger. During this state, they often float motionless at the surface in a posture called “logging,” as they resemble a floating log. |
| 2 | Sperm Whales | Sperm whales sleep while hanging vertically in the water, completely still. They can remain in this deep sleep state unaware of their surroundings until physically disturbed, at which point they awaken and quickly swim away. |
| 3 | Elephants | Elephants are among the lightest sleepers in the animal world, sleeping only about two hours a day in the wild. Their sleep is typically broken into short naps, mostly taken while standing. Occasionally, they lie down for deeper sleep. |
| 4 | Koalas | Koalas sleep for about 14 hours a day, with additional periods of rest. Their extended sleep is due to their diet of eucalyptus leaves, which are low in nutrition and require significant energy to digest. |
| 5 | Walruses | Walruses can sleep virtually anywhere — floating on the ocean surface, lying on the seabed, or even while tethered to an ice floe by a tusk. Remarkably, they can also stay awake for extended periods, reportedly swimming continuously for up to 84 hours without rest. |