BEAUTY OF THE FISH
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Yes fish do sleep, and they sleep with their eyes open! They go into a daydream (or night-dream) mode when they are resting. Unlike humans, who have a regular sleep pattern, fish can take a nap anytime they want.Google image
Of course they have to keep moving their fins during their nap-time, but that minimal movement is just to maintain their position in the water. Generally, fish move their fins even when asleep because they need to have water moving constantly through their gills to maintain the required amount of oxygen.
BEAUTY OF THE FISH
Google image
Some fish species have obvious sleep-like characteristics than others. For example, goldfish in a fish tank will seem to be in a trance, hovering towards the bottom of the tank when you take a peek at them in the middle of the night. Fish which belong to the coral reef are active in the day, hide and rest in crevices and cracks in the reef to avoid being eaten at night.Google image
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