1 year ago
Last edited at 3:16AM on 5/23/2012
This is what I read...
"...And some fish do seem to stop moving when they sleep, but others cannot afford to stop moving. Tuna, for example, MUST STAY IN MOTION because they need to have water moving constantly over their gills to get oxygen. " Read more: http://www.answers.com/topic/do-fish-sleep#ixzz1vgbrx3gv
Fish sleep but not in the real sense of the word as they do not have eyelids to close. However, they have a period of reduced metabolism and activity which is just like sleeping so yeah, they still swim while they sleep
I see some people are saying they float when they sleep? O.o My bettas all sleep, and the sit at the bottom when doing so. It's easy to tell when they are cuz I can poke the bowl and they don't hardly move. But yes, all fish sleep. My Glofish and guppy sleep as well. But all sit at the bottom, so the floating that people are saying is confusing me.