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Shark

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? Do They Dream? - 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, ...

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?

zoology - Do sharks never sleep? - Skeptics Stack Exchange

skeptics.stackexchange.com/questions/8595/do-sharks-never-sleep

Mar 25, 2012 ... My friend was saying that shark never sleeps. Because to keep it afloat, it has to continuously swim, so that it can't sleep. This claim is repeated ...

Sharks - Sleep

www.sharksinfo.com/sleep.html

Sharks - Sleep. Image of a Whitetip reef shark - Triaenodon obesus - laying on the sea floor in. Whitetip reef shark - Triaenodon obesus - laying on the sea floor  ...

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 ...

Facts about Sharks - Shark Facts and Information

www.sharks-world.com/facts_about_sharks/

Sharks do sleep, but they do so with their eyes open. Only one side of the brain sleeps at a time so that they are able to continue the cycle of taking in air as they  ...

Do sharks sleep at night? - Ask.com

www.ask.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 ...

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

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 ...

Shark Sleeping - Will a shark drown if it stops moving ... - Animals

animals.howstuffworks.com

See if shark sleeping is a myth or a reality. ... In a study of lemon sharks, which switch between breathing methods, juveniles ... Do feral cats spread disease?