While environmental concerns about the effect on water quality, seafloor degradation, the sustainability of various fish feeds, and impacts to wild populations present challenges to promoting marine aquaculture methods, the US net-pen aquaculture sector addressed these issues. From research producing feeds containing less fish meal and fish oil and limiting nutrient discharge, to reducing the use of antibiotics and incidence of fish diseases that could impact the wild populations, net-pen aquaculture has become an efficient food production system.