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No. Sharks are always swimming. If they stop, they will suffocate. Water passes by their gills, and stray oxygen molecules pass through as their means of "breathing." Because of this, they must remain in motion. For sleep, sharks (and dolphins, for that matter) shut down half of their brain, and use the other half to reamain swimming and watch for threats. The halves take turns resting.

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15y ago

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