Is it true.?

Question

that fish don't sleep? or that they do except that have to keep moving? apparently if they stop they will drown lmao. Imagine like a fish that can drown:|. They live in the water it just doesnt seem right lmao x

Answer 1

I know sharks have to keep moving so water can flow through their gills. This is how they breathe. They can stop swimming, however, if they are in an underwater current because the force of the current will keep the water flowing through their gills. I don't think most fish have eyelids either.

Answer 2

Most all fish spend time in an energy-saving state that can be called "rest", and we might even call their behaviour "sleep", though it is probably different than "sleep" in most land animals. Many fish, like Bass and perch, rest on or under logs at night. Coral reef fish active in the day, hide and rest in crevices and cracks in the reef to avoid being eaten at night. The resting behaviour of fish is very different from their behaviour the rest of the day. Many minnows, for example, which are very active in schools during the day, scatter and remain motionless in shallow water at night. Many fish "rest" or "sleep" during the day and are active at night instead, but almost all fish "sleep". There are some animals that never stop swimming, like many species of shark, however, they HAVE to keep moving to push water through their mouths in order to breathe, and they may still sleep while moving.(http://www.newton.dep.anl.gov/askasci/bio99/bio99047.htm)

It all depends on what you mean by sleep. My dictionary says that sleep is a period of rest in which the eyes are closed and there is little or no thought or movement. That is, sleeping means closing your eyes and resting. The first thing we notice is that most fish don't have eyelids (except for sharks). Also, while some deep ocean fish never stop moving a great many fishes live nearly motionless lives and many do so on a regular diurnal/noctural cycle, some active by day others by night.. So we can't generalize and say that all fish sleep like we do. But most fish do rest. Usually they just blank their minds and do what we might call daydreaming. Some float in place, some wedge themselves into a spot in the mud or the coral, some even build themselves a nest. They will still be alert for danger, but they will also be "sleeping." (http://www.nefsc.noaa.gov/faq/fishfaq1.html)

Answer 3

They can drown several ways ...They must keep water flowing through their gils to pick up the oxygen they need...
If , the gill is damaged by a hook, and that fine mechinsim is altered a fish can drown....

Answer 4

Fish do sleep. I sneek up on him. to get something thats next to him. Cause if he wakes up he starts begging for food, He does flips forward and backward. Hes really a cute fish!!

Answer 5

Some fish sleep.. But most fish rest. Thats what i heard anyways :]

Answer 6

they do sleep, much the same as most animals in the water, they sleep half their brain at a time. this keeps their motor skills running.
they dont sleep as othen as we would, they probably sleep a few hours every week, and when you et realy deep in the see time looses all relativety, since theres no light so deep, night and day mean nothing.

Answer 7

They dont sleep as such but they do rest, and when they do this they dostop moving. They can stop moving because they have gills which do the work for them. Most sharks cannot stop moving !

Answer 8

Can you imagine never being able to sleep you always have to keep moving. I'd hate that.

Answer 9

t is my understanding that fish do not sleep and they keep moving all the time.

Answer 10

we have like a pondful of fish in our garden and I've never noticed that lol...one stopped moving before though but we poked it with a stick and he swam off again :)