Orcas are a class of whales, and they are very fierce creatures in the ocean. When orcas are born, and for some time after, they don't need to sleep. As they get older, they need to start sleeping, and they need to gradually increase their sleeping time. After they grow up, they need to sleep every day, and the sleep time is relatively long, which may be between 5 and 8 hours.
As mentioned above, killer whales need to sleep. However, their sleeping patterns are quite strange and very different from those of humans and other animals. When orcas sleep, their brains are not completely at rest, but one side of the brain is at rest and the other side is working, so that they can remain alert while sleeping. Also, they tend to sleep together in groups. Biologists have done special research on this phenomenon, they are generally a few or even about ten heads together to stay together, so the safety is relatively high.
When killer whales sleep, their specific state is different. After research, it was found that they might sleep floating on the surface of the water, lying on the bottom of the water, or even sleeping in a vertical state in the water. In addition, because they also have one side of their brain working while they sleep, they may even be active while they sleep.
