Do fish sleep?
Fish keep moving,to keep the water/oxygen flowing through their gills...however,in cold weather,they hibernate.
Yea, some with their eyes open
Yes... With their eyes open
yes, but not sharks if they stop moving they would die because they need water flowing in their mouths and out their gills to extract oxygen from the water.
Yes, but they musk keep moving at all times to oxygen to the gills.
Yes fishes sleep but they sleep with their eyes open.
Heck yes they do!