As aquaculturists focus more on disease prevention, this has led them to emphasize biosecurity and health programs to prevent the entry of disease-causing organisms into the culture system. They must also ensure that stocks are kept in a healthy state allowing them to harness their own natural defense systems to fight disease.
The foundation to healthy aquatic species is a solidly functioning immune system. In a time where traditional antibiotics have been limited or banned in many parts of the world, aquatic diseases have emerged at a rapid pace.