Fish, where do you sleep? It's dark and quiet at night, Xiaoyu. Where do you sleep? Fox's footprints lead to caves, puppy's footprints lead to nests, squirrel's footprints lead to tree holes and mouse's footprints lead to underground caves. Not in the river, not in the water, your footprints, nowhere to go, Xiaoyu, where do you sleep?
Extended data:
Fish like to stay still and fall asleep upright in caves or overgrown places. They only sleep for a few minutes at a time, and some fish wake up after only a few seconds. Many fish, such as perch, sleep on or under logs at night.
Corals are active during the day and rest in cracks in rocks at night. Many small fishes of CYPRINIDAE are very active during the day, but they are scattered in shallow water at night. Some fish rest during the day and move at night. Some animals have been swimming because they have to keep spitting water to keep breathing, but they may still sleep when they exercise.