Which is a disadvantage of using aquaculture to produce fish? apes?

I think one disadvantage of using aquaculture to produce fish is the use of grain for feed for some species. Aquaculture is the farming of fish, crustaceans, molluscs, aquatic plants, algae, and other organisms. It involves cultivating freshwater and salty water populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish.

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.