"The Shape of Water" is a fictional movie that blends elements of fantasy and science fiction. While it can be entertaining and thought-provoking, it is not grounded in scientific reality. The events and abilities portrayed in the movie, such as the ability to breathe liquids, do not have scientific explanations or evidence to support them.
In reality, humans are unable to breathe liquids like water for an extended period. Our respiratory system is specifically designed for breathing air. The human lungs are adapted to extract oxygen from the air we inhale, and the oxygen is then transported to the body's cells through the bloodstream. Liquid-filled lungs would not provide the necessary exchange of gases, and oxygen deprivation would likely occur.
However, it's worth noting that certain aquatic animals have developed unique adaptations to extract oxygen from water. For example, fish use gills to extract dissolved oxygen from the water and expel carbon dioxide. This process is not applicable to humans.
In summary, while "The Shape of Water" presents a fictional scenario where a character can breathe liquids, there is no scientific basis or explanation for this ability in real life. It remains within the realm of imagination and storytelling.