There are varieties of krill with sizes large enough for consumption to be harvested in 'aquaculture.' China knows something about aquaculture.
Currently, the thought of aquaculture sends chills down the spine of The First World and especially in a culture designed by Bush that wants to sell American Grain Raised Beef as a superior product. Not so. There is much to be said for 'grass fed' beef as raised in abundance in Mexico.
But, to realize how much of the American diet is reliant on grains is to realize the paradox of First World use of grains when the economic demands will come first of the profiteers leaving those in need in the Third World out of the picture.
In my opinion, krill is not an inferior nutritional product nor is it to be overlooked in it's capacity to be included in Sustainability by the United Nations. It is a 'food culture' that African economies can raise themselves and harvest off their shores as well. It is possible to overfish this ocean life to the point where it would interrupt the fisheries but not if done in open ocean cages of aquaculture.
What do krill eat?
Let's look.
