For example, the tilapia fish produce ammonia-based waste, which is sent through a biofilter before the nitrates are fed to plants growing in hydroponic beds.

CNN: 'Vertical farm' blossoms at meatpacking plant

Despite still being under construction The Plant currently has five tenants, including aquaponic farms, a hydroponic farm, bakers, tilapia fish breeders, a mushroom garden and a kombucha tea brewer (a type of tea said to have health benefits).

CNN: 'Vertical farm' blossoms at meatpacking plant

Still, he suggests consumers eat more farmed fish such as tilapia and catfish, which don't need as much fish meal in their feed.

WSJ: Guidelines for Eating Sustainable Seafood

Their inland shrimp farm uses another fish, the tilapia, to mop up the shrimps' waste.

ECONOMIST: Fish farming

Domestic farm-raised fish, such as tilapia, catfish and shellfish, accounts for about another 10% of U.S. consumption.

WSJ: Guidelines for Eating Sustainable Seafood

In general, white-fleshed fish, such as cod, tilapia, or flounder, are low in all types of fat, including omega-3s.

CNN: How to buy the best fish