Bullfrogs are the only animal that never sleep

Famous for its deep "ribbit", the bullfrog is the only animal in the world that never sleeps. When tested by scientists, the bullfrog responded exactly the same way as to being shocked whether it was awake or resting, leading scientists to believe that bullfrogs never actually sleep. The only other animal that might not ever sleep is the jellyfish, which has such low brain function that it is almost impossible to tell. No wonder bullfrogs seem to be up all night.