Which diagnostic test is NOT typically used in aquatic veterinary medicine?

Genetic testing is not typically employed as a routine diagnostic tool in aquatic veterinary medicine. While it holds value in specific contexts, such as assessing breeding stocks or researching genetic diseases within populations, it does not generally play a role in the immediate clinical diagnosis of health issues in aquatic animals. In contrast, methods like CT (computed tomography), ultrasonography, and endoscopy are valuable imaging and diagnostic techniques that are widely used to assess the health of aquatic species, allowing practitioners to visualize internal structures, evaluate organ function, and obtain direct views of the gastrointestinal tract, respectively. These tools are integral for diagnosing a variety of conditions in fish and other aquatic animals, whereas genetic testing is not a standard part of the diagnostic process for specific health issues.