why do sharks move continuously
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why do sharks move continuously
why do some sharks need to move continuously
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how do sharks move
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do shark have to move constantly
why can't sharks stop moving
why do sharks migrate
why do people rotate sharks
why do sharks go to the surface
why do sharks come close to shore
how do sharks effect
how have sharks changed over time
why do sharks move continuously, why do some sharks need to move continuously, why do sharks have to keep moving, how do sharks move, do sharks have to constantly move, do shark have to move constantly, why can't sharks stop moving, why do sharks migrate, why do people rotate sharks, why do sharks go to the surface, why do sharks come close to shore, how do sharks effect, how have sharks changed over time
