Are there any animals that never sleep?



  1. 0 Votes

    Fish appear to never sleep because they sleep with their eyes open. However, the bullfrog never sleeps. That could be why you hear them all night long! They take rests, but never actually sleep.

  2. 0 Votes

    Whales and dolphins are also never completely unconscious.  When entering a rest state, they only allow one half of their brains to enter an unconscious state.  Handy for avoiding predators in the open ocean!

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