Do goldfish sleep?

All living things sleep or do rest in some way. Goldfish however can't close there eyes and they will just be laying on the bottom of the tank. You have no need to worry if it's dead unless it is laying upside down.
Fish don't really sleep. They just kind of rest by floating in the water, staying quite still.
Amazingly, NO :) they rest in the tanks. how they do that?

They slow down their metabolism and rest in a safe area.