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.

Occasionally, they enter a deep sleep state known as "logging," where they float near the water's surface, resembling drifting logs. Fish sleep with their eyes open since they lack eyelids!

Energy savings during sleep have been reported in various animals, including humans, cats, rats, birds, and fruit flies, but it is not known whether energy consumption has decreased during fish sleep.