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Yes they do when they are sleeping. They tend to just float when they are asleep.
Wiki User
∙ 9y ago
Wiki User
∙ 12y agoNo, it is true.
They stop swimming a lot though.
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How do sharks eat and sleep?
That depends on the type of shark. BTW in case you were wondering, it is not true that all (most) sharks can never stop swimming and must always be moving otherwise they die. But it is true that they need flowing water.
Why do most sharks have to swim at all times before they sink?
This is actually not true at all times or for all sharks. It is true that most sharks need moving water in order to breathe, but there are underwater currents where sharks can stop, because the water is moving around them.
Do sharks need to move constantly?
No. This is a common miscomception. Fish need to move to filter water through they're lungs to get Oxygen. But Sharks gills contract and expand to draw water in and can remain motionless, and healthy like Nurse Sharks.
Is it true sharks have never evolved?
No, but they've remained very much the same for a very long time.
Is it true that frogs and toads never stop growing?
Yes its true its actually amazing and astonishing that toads never stop growing. Sources: Evelution Through Natural Selection (Book)
Is it true that swimming and doing other sports should be avoided during menstruation?
no, that's not true. do not let your menstrual cycle stop you from doing things you enjoy.
Are there any sharks in Rio de Janeiro?
yes there is every species swimming in our oceans including great white, tiger shark, reef shark, nurse shark, hammerhead shark, plus many, many more. for more species of sharks go to google and look up " types/species of sharks"
What is one direction sharks cannot swim in?
im not sure if this iss true or not, but i think they can't swim backwards. They don't . they never have
What is true of whale sharks but not true of most sharks?
Compared to most sharkes, whale sharks are considered to be non threatening to human beings. It is the largest non mamal verterbrate in the animal kingdom.
Is it true sharks never sleep?
Some will rest on the bottom and even at the surface (baskings shark) but whether they are truly sleeping we do not know. It is likely they are alert is some manner to avoid predators and other dangers.
How many 'swans-a-swimming' did your true love send?
Seven swans-a-swimming
How high is the sky outside?
nobody knows how high the sky is it will never stop in the past and i mean a long time ago people had thinked that they can reach to the top of the sky but it is not true the sky will never stop
