2006-12-14 02:08:29 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Biology
I think they have to keep moving at least a little bit for water to run over their gills. So they probably slow down a lot, but keep moving. That's just a guess, I'm not a marine biologist like George Costanza.
2006-12-14 02:10:23 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Most do not. Their is some evidence that some spices of shark do stop moving & appear to be resting. If you have a fish tank & one appears to be a sleep. His a goner. Flush him and go to the pet store & get a new one.
2006-12-14 10:12:42 · answer #2 · answered by GJfromfla 3 · 0⤊ 0⤋
yes, they do. However, if your fish is laying on his side, he's probably sick or dying or dead. Some fish sink when they sleep and some rise to the top, but they never sleep on their sides!
2006-12-14 10:20:04 · answer #3 · answered by vicarious_notion 3 · 0⤊ 0⤋
yes usually they will be low to the surface of the aquarium. not much movement. they are asleep
2006-12-14 10:11:32 · answer #4 · answered by angela s 3 · 0⤊ 0⤋
Yes!
2006-12-14 10:10:22 · answer #5 · answered by hondalos11 3 · 0⤊ 0⤋
Maybe, but their eyes are open all the time and they are very alert, unlike human, if they do, they wake up like they didn't sleep
2006-12-14 10:16:16 · answer #6 · answered by YourDreamDoc 7 · 0⤊ 0⤋
they do fall asleep. but with their eyes open.
2006-12-14 10:11:24 · answer #7 · answered by kylee 1 · 0⤊ 0⤋
Yes they just doing have I lids.
2006-12-14 10:10:08 · answer #8 · answered by moni 1 · 0⤊ 0⤋
Yes, they sleep. They don't have eyelids though
2006-12-14 10:16:20 · answer #9 · answered by SamIam82 5 · 0⤊ 0⤋
well that's a good question I think every animal have to sleep.
2006-12-14 10:16:02 · answer #10 · answered by it 1 · 0⤊ 0⤋