What is really needed: Genetic engineering to get land-based crops to produce the omega 3 fatty acids DHA and EPA. This will not provide me with delicious sash

What is really needed: Genetic engineering to get land-based crops to produce the omega 3 fatty acids DHA and EPA. This will not provide me with delicious sashimi. I somehow doubt the majority of the increased demand for fish is because people want their oil for health reasons. A better source of food for the farmed fish would be a more practical way to mitigate the environmental stress caused by aquaculture.