Dolphins can't live on land, although dolphins are mammals, and like humans, they breathe with their lungs. However, they have no limbs and cannot move on land. In addition, they need more water in their lives. When they leave the water, the water in their bodies will gradually evaporate, and eventually they will dehydrate and die.

Even if they can live in a humid environment, they can't move normally. Because dolphins are relatively large, and their bodies have adapted to the life of seawater. After losing the buoyancy of seawater, they can't bear the weight of their bodies, and they may suffocate and die. Therefore, dolphins can't live on land. Of course, because dolphins breathe through their lungs, they can survive on land for a short time, but if the time is too long, they will also die.

As mentioned above, dolphins breathe with their lungs, so they can't stay in the water all the time. When they take a breath, they will first discharge the exhaust gas from their bodies through their nose and mouth, and then inhale fresh air through their nose and mouth and store it in their lungs. Their lungs are larger and can store more air, so they can last longer in water for a single breath. Usually, dolphins change their air every 20-30 minutes or so.