Can anyone knowledgeable comment on if farming insects, like grasshoppers that are apparently very efficient in turning feed to protein, will become a viable alternative for salmon and tuna farms?
Of the currently known methods for producing proteins, the one that has the potential to be significantly more efficient than raising chicken or insects is the culture of genetically-modified strains of the fungus Trichoderma, which produce either ovalbumin (the main protein of egg white) or beta-lactoglobulin (the main protein of whey).
These egg-white proteins or whey proteins are identical to those of chicken eggs or cow milk and they have an excellent amino acid profile.
They could easily satisfy all the protein needs of a human. Such proteins are water-soluble powders, looking the same as the whey protein concentrates that can be bought now.
Used alone, they would be bland, but they can be an essential ingredient for cooking various kinds of tasty food, from savory dishes based on various vegetables to sweet creams, e.g. with cocoa or vanilla.
I am currently using whey protein concentrate for cooking and I would like very much if a fungus-produced alternative would become available at a decent price. I prefer very much such a protein powder, which can be used to enhance both the taste and the nutritional value of any food, instead of fake meat.
AFAIK the black soldier fly (BSF) larvae and the yellow mealworm are the two species which are in focus. For BSF larvae I believe they have some extremely convenient biological urge to migrate once they have reached maximum size, so it's possible to set up systems where they "collect themselves" at the optimum size for processing into meal.
But I don't want to characterise myself as knowledgeable on this topic, so this isn't the answer you and instead something which you can hope will provoke somebody to give you the real answer.
I use DHA+EPA from algae (a Swedish company, Simris Alg), and that is non-GMO anyway.
Btw, shrimp are fairly popular, and they aren't that different from insects.
But yeah, I like my meat, and don't feel well about the idea of eating insects.