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Sleeping fish? From sharks to salmon, guppies to groupers, here's how they grab a snooze

  • Written by Michael Heithaus, Executive Dean of the College of Arts, Sciences & Education and Professor of Biological Sciences, Florida International University
imageA large group of yellowfin tuna swimming off the coast of Italy. Like all fish, they sleep, but it's not like human sleep.Giordano Cipriani/The Image Bank via Getty Imagesimage

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Read more: Sleeping fish? From sharks to salmon, guppies to groupers, here's how they grab a snooze

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