The main environmental concern associated with fish farms is the spread of disease and pollution, which can impact surrounding ecosystems.

The possibility of contamination and disease transmission is the main environmental issue with fish farms. Because farmed fish are frequently housed in cramped quarters, illness outbreaks may become more likely. Local ecosystems may be disrupted if these illnesses spread to wild fish populations. Furthermore, the surplus nutrients from fish waste and uneaten feed from fish farms can pollute nearby waters by causing eutrophication, algae blooms, and oxygen deprivation. Sustainable aquaculture methods, which emphasize improved waste management, disease prevention, and a decreased use on antibiotics, are being developed to lessen these effects.