Question

which living creature never sleeps

Answer 1

fishes...and The bullfrog was chosen as an animal that doesn't sleep because when tested for responsiveness by being shocked, it had the same reaction whetherawake or resting. However, there were some problems with how the bullfrogs were tested.

Answer 2

Bullfrogs are thought to be animals that can survive without sleeping for months at a time. While they shut their eyes and go on to rest, they remain alert during these periods. According to research even while resting these huge amphibians were awake enough to respond to painful stimuli and show respiratory changes.

I hope this answer helped you.