about fish

I never think to watch fishes sleep. So how about you? How do you find fishes sleeping?

With their eyes open swiming very slowly: it's quite funny to watch!

Great question, I've always wondered the same thing. I searched it on the web and found this... Yes fish sleep. But it’s not sleep as we know it. They don’t have eyelids to close, they sometimes do it during the day, they don’t show the characteristic brainwave patterns like REM sleep seen in humans, and some, including most sharks have to keep swimming in their sleep. Pretty interesting!