Physiology is the science of how an animal's body responds and interacts with its environment. Swimming performance, heart rate, oxygen consumption, body chemistry and hormones, and survival under a range of situations are all parameters that are frequently measured in fish physiology studies. Fish physiology is crucial for maintaining fish populations, particularly in modified waterways. Physiological studies can provide a wealth of information that can help with fish conservation and management. These include how fish react to and tolerate a variety of environmental situations, as well as how fish bodies and internal systems evolve over time (including smoltification and reproduction).
Everyone can benefit from biochemistry. It is the foundation of both fish biology and fish processing science. Fishery biochemistry is a sub-discipline of veterinary biochemistry that deals with the biochemical composition of fish.