As these fish simply stop swimming when they sleep and rest on their sides, it is easy to observe them when they are actually ...

"Do Fish Sleep?" published by Enchanted Lion Books, written by Jens Raschke, illustrated by Jens Rassmus and translated from the German Belinda Cooper. Originally published in 2017 as "Schlafen Fische ...

Do fish sleep? This question often arises from curiosity about the sleeping habits of aquatic creatures. While fish do not sleep in the same way land animals do, they do have periods of rest.