This scientific study on the aquaculture/agriculture potential in the poorest nations in the world, shows that environmental degradation is reducing nations with the 700 million poorest aqua-farm families in the world, abilities to make enough food. This is a critical problem.
Fish farms as we know then in the first world use the ocean as a free open sewer and have a high environmental impact, including using the fish meal that should be used in poorer countries to feed people. This study shows that even in subsistence farming there is a high environmental damage.
This means that fish farms around the world, in rich and poor countries, need to move on to land, something that is far more easily achievable in the first world because of the ability of consumers to pay, and their growing preference for environmentally sound farming methods.