do u think fishes sleeps too??

Answer 1

Reptiles, birds, fish and mammals all sleep. That is, they become unconscious to their surroundings for periods of time. Some fish and amphibians reduce their awareness but do not ever become unconscious like the higher vertebrates do.


Whales and dolphins are mammals, so in a lot of ways, they are just like human beings. Among other things, they have similar bone structure, are warm-blooded and give birth to "live young." The biggest differences between these animals and human beings are related to our respective environments. Whales and dolphins have a unique respiratory system that lets them spend long periods of time (sometimes 30 minutes or longer) underwater, without taking in any oxygen.
On land, human beings and other mammals breathe involuntarily: If we don't make a decision to breathe or not to breathe, our body will take in air automatically. Because of their undersea environment, whales and dolphins must be conscious breathers: They have to actively decide when to breathe. Consequently, in order to breathe, they have to be conscious. This presents a problem, since mammalian brains need to enter an unconscious state from time to time in order to function correctly. There's plenty of time for a dolphin to catch a catnap between trips to the ocean surface, of course, but this isn't a viable option. When you're a conscious breather, it's just not feasible to be completely unconscious -- what if you don't wake up in time? The solution for whales and dolphins is to let one half of the brain sleep at a time. In this way, the animal is never completely unconscious, but it still gets the rest it needs
Scientists have studied this phenomenon in dolphins, using electroencephalography. In this process, electrodes hooked up to the head measure electricity levels in the brain. The resulting electroencephalograms (EEGs) of dolphin brains demonstrate that in the sleep cycle, half of the dolphin's brain does indeed "shut down" while the other half is still active. Researchers have observed that dolphins are in this state for approximately eight hours a day.

We can't really know what this rest state feels like, but we can make a good guess. It is probably something like the semi-conscious state we experience as we begin to fall asleep. We're pretty close to unconsciousness, but are aware enough of our surroundings to wake up completely if we need to.

And where do dolphins and whales sleep? They could probably sleep anywhere, but it makes sense that they would do it near the surface of the ocean so they can come up for air easily. It's not uncommon to see dolphins "logging," swimming slowly along the surface, with very little movement. Presumably, these are dolphins at rest.

Answer 2

Yes fish do sleep. When you turn all the lights out at night in your aquarium they will all go down near the bottom of the tank and lay there until the sun comes up.

Answer 3

I know they do. In fact, all three of my tanks are probably asleep at this point. I know, because the one day, I forgot to feed all my guys in my big tank. Turned the light on at eleven that night, and none of the fish did much moving, and they were all very pale - almost colorless (and for a neon tetra to look like this, that's bad). I put some food in, and none of them came up to eat. I went on a frenzy checking all my parameters, til my fiance told me just to sit for a while and see if they looked any better after some time. Sure enough, half an hour later, they all had their color, and were back to eating like normal.

Answer 4

Yes when lights are out, fish slow down, usually moving only a bit to stabalize, many particularly interesting ones, such as the clown loach, actually lie on their backs or sides while resting. Also, since they don't have eyelids, they can't close their eyes, so turn off those lights!

Answer 5

Yes! I'm a scuba instructor and I've seen them sleeping on the bottom of the ocean during night dives.

Answer 6

yes. My fish sleep all the time. They always keep their eyes open though....

Answer 7

Yes, I know they sleep.

I wake up about 100 a day. Some wake up slow and some freak and run into stuff if they get surprised.

Answer 8

Yes, at the bottom of the tank when the lights are off.

Answer 9

some sleep at the bottom some just float in place

Answer 10

yes, when the lights are low they sleep