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Shark - Wikipedia

en.wikipedia.org/wiki/Shark

Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on ..... Unlike bony fish, sharks do not have gas-filled swim bladders for buoyancy. ..... Species that...

How do white sharks sleep? - Marine Dynamics

www.sharkwatchsa.com/en/blog/category/482/post/1099/how-white-sharks-sleep/

Shark sleeping patterns have puzzled scientists for many years. All sharks extract oxygen from the water with their gills, and to do this water must move over and ...

How Do Sharks Swim While Asleep?

www.elasmo-research.org/education/topics/b_sleep.htm

In response to a question about whether or not sharks sleep and, if they do, how do they swim while unconscious, I wrote: Sleep is one of the last bastions of ...

How Do Sharks Sleep? Get The Fascinating Facts Here!

www.sharksider.com/how-do-sharks-sleep/

Jan 19, 2016 ... Sharks do not experience sleep the same way humans do. Some can't sleep at all, and the ones that do never close their eyes. Some shark ...

Do Sharks Sleep? - International Wildlife Museum

www.thewildlifemuseum.org/exhibits/sharks/do-sharks-sleep/

Sharks do not sleep like humans, but instead have restful periods. Sharks become semi-conscious rather than fall asleep. Certain species of sharks have to  ...

Do sharks sleep at night? | Reference.com

www.reference.com/pets-animals/sharks-sleep-night-4e9c1ce224928a15

Sharks rest in an approximation of what is termed sleep in land animals, though they do it with their eyes open. However, some sharks are nocturnal, which ...

www.ask.com/youtube?q=Do Sharks Sleep?&v=_fnjgF9K_YE
Mar 18, 2011 ... 2 White Tip Sharks hanging out in a cave while a cleaner wrasse does its job! Who knew sharks could just sit?

How Do Sharks Sleep? Do They Dream? | The Huffington Post

www.huffingtonpost.com/van-winkles/how-do-sharks-sleep-do-th_b_7743920.html

Jul 7, 2015 ... Sharks and their sleeping habits are still very much a mystery, mainly because of the challenge of monitoring sharks for a 24-hour period, ...

Sharks - Sleep

www.sharksinfo.com/sleep.html

For this reason, it was supposed for a long time that sharks did not, in fact, sleep. However, sharks need to rest at some stage and different species accomplish ...

Do Sharks Sleep? « Dutch Shark Society

www.dutchsharksociety.org/do-sharks-sleep-2/

Jan 9, 2014 ... Humans love to crash on the coach every day, but sharks don't. Some sharks, like the pelagic species, just have to keep swimming. For them ...

Answer
Sharks do not sleep like humans do, however they do appear to have restful periods.
More Info

Do Sharks Sleep? - Marine Life - About.com

marinelife.about.com

Nov 30, 2015 ... Despite all the research on sharks over the years, shark sleep is still somewhat of a mystery. Learn the latest thoughts on whether sharks sleep.

Do Sharks Sleep? - SharkSider.com

www.sharksider.com

Dec 30, 2014 ... Sharks are the terrors of the seas to some but the most graceful and amazing creatures to others. No matter what your personal opinion of ...

Great white shark caught sleeping on film for the first time | MNN ...

www.mnn.com

Jul 1, 2016 ... But like all animals, sharks still need to sleep. So how do they snooze when they need to swim? Interestingly, very few shark species have ever ...