Question

How do fish sleep underwater?

Answer 1

Fish do not sleep in the same way that humans do. They do not have eyelids, so they do not close their eyes to sleep. Instead, some fish enter a state of rest where they slow down their movements and metabolism, while others may find a safe spot to rest in the water. Fish are always alert to predators even when resting, so they are able to quickly swim away if needed.

Answer 2

Fish sleep underwater by remaining in a state of reduced activity where they rest but still remain alert to their surroundings. Some fish may find shelter in rocks, plants, or coral to feel safe while they sleep. It's important for fish to constantly move water over their gills to extract oxygen, even when they are resting, so they sleep in a way that allows them to continue this essential process.