Air is pumped into the water so the fish have enough oxygen to breathe. The water is cleaned and recycled daily. Young fish are fed fishmeal flakes many times a day to help them grow. Older fish eat fishmeal pellets. Most fish farms have feeders that put food into the water at set times during the day.
Some farms use a demand feeder , which allows fish to eat whenever they want.
The fish hit an object in the water and feed drops into the water. Other Could be a few hundred to a few thousand by one female Eats dry flakes of fish meal several times a day. Eats less than 1 gram of fishmeal per day. Fed several times a day. Eats 2 grams of feed pellets on demand per day.