What is a draw back of raising fish in fish farns

Fish farming can be described as a method which is devised to raise fishes commercially in tanks or ponds.

Some of the disadvantages of creating fish cultures are:

Keeping fishes in closed tanks increases their chance of getting a disease. If a disease is caused by a contagious microorganism then the disease will spread in every fish in the tank as its a closed proximity. There will be less genetic variation in fishing tanks. The certain antibiotics and chemicals used in fish tanks and ponds might be toxic for the fishes and effect their health.