Aquaculture is one of the world's fastest-growing food-production industries, rising at a rate of leaps and bounds. Aquatic farm animals and plants, unlike other terrestrial farm animals and plants, require extra attention to maintain their health. Except in tank-holding settings, they live in a complex and dynamic habitat and are not easily seen. In the same way, feed consumption and mortalities are well masked beneath water. As a result, the difficulties that aquatic creatures encounter are species and system specific. Because of the complexity of the aquatic ecosystem, distinguishing between health, inadequate performance, and disease can be challenging. One of the primary issues faced by aqua culturists around the world is the variety of diseases present in the industry. In aquaculture, diseases are the result of a chain of events including interactions between the host, the environment, and the presence of a pathogen.