Fish welfare refers to the well-being of fish in various environments, including aquaculture, research, and natural habitats. It encompasses the physical and mental health of fish, ensuring they can express natural behaviors, have access to clean water, and are free from stress and pain. Improving fish welfare is important for ethical, environmental, and economic reasons. Practices such as proper handling, appropriate stocking densities, and suitable water quality can enhance the quality of life for fish. Organizations and researchers often study fish behavior and physiology to develop guidelines that promote better welfare standards in settings like aquaculture and fisheries.