Because they will drown if they don't. They have to keep moving to force water through their gills.Though they do sleep but not in the way that we do.
stay awake
Stay Awake was created in 1964.
In addition, the patient must remain awake in order to report any sensory changes during the surgery.
Stay Wide Awake was created in 2009.
'Stay Awake' is a mixture of dance/dubstep
they can stay awake for a very very very very long time!!
Stay Awake - song - was created on 2011-08-28.
It would stay awake all night ( nocturnal ). Then it would stay asleep for the day.
Well if your asking hours I can't answer that. But I've heard that you can stay awake for 11 days. But don't try it you need your sleep
Alcohol in any form should not be your choice of beverage to stay awake.
The Langoliers
Yes, they did use drugs to stay awake, they also used caffine.