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



Unlike bony fish, sharks do not have gas-filled swim bladders for buoyancy. ... Most sharks need to constantly swim in order to breathe and cannot sleep very ...

How do white sharks sleep? - Marine Dynamics


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 Sleep? - Marine Life - About.com


Sharks need to keep water moving over their gills so that they receive oxygen. So that seems to mean that they need to keep moving all the time...or do they?

If sharks need to keep water moving over their gills to receive oxygen, then how do they sleep? Some sharks have spiracles, a small opening behind their eyes, that force water across the shark’s gills so the shark can be still when it rests. These sharks have active ... More »

How Do Sharks Swim While Asleep?


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 ...

Do Sharks Sleep? - Sharks Are People Too


Some sharks like great whites and hammerheads must keep moving in order to stay alive. They are known as obligate ram ventilators because of the need to ...

Shark Basics - Florida Museum of Natural History


Do sharks have bones? How long do sharks live? What does a shark's skin feel like? Do sharks sleep? Do sharks have good eyesight? Can sharks hear?

Do sharks sleep? - YouTube


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?

Do Sharks Sleep? The Ultimate Question Is Answered


Dec 30, 2014 ... Do sharks sleep? We know a lot about sharks and yet, we also know so little. One frequent question people have is, do sharks sleep? Here is ...

Popular Q&A
Q: Do sharks sleep?
A: Shark do sleep, it seems all the creatures on the planet relax, sleep, even hibernate in same cases. For the shark species who have to swim to keep breathing th... Read More »
Source: www.quora.com
Q: Do shark sleep?
A: Scientists don't really know if shark sleep or not. Read More »
Source: wiki.answers.com
Q: Do do sharks sleep
A: Sharks don't sleep like we do. They need to think about their breathing and sleep by letting half their brain shut down and rest (with 1 eye open). Read More »
Source: www.kgbanswers.co.uk
Q: Do sharks sleep?
A: Your teacher is talking about a swim bladder not a swim tummy. Anyway the swim bladder keeps them from sinking, yes, but it has nothing to do with why some shar... Read More »
Source: answers.yahoo.com
Q: Do sharks sleep and how?
A: They sleep but some sharks can't stop swimming to sleep, they need to keep water moving over their gills to breathe, other species sleep still on sea-bed Read More »
Source: www.kgbanswers.co.uk