Ah, fish - the one farmed animal we have not figured out how to feed with soybean yet. Soon, I guess.
I'm not quite sure "fish-free fed fish” is going to have the same cache as “grass-fed beef," despite the article's suggestion.
This feels very close to Silicon Valley's bit about pescepescetarianism.
I've been taking algae supplements lately. It tastes like fish food because it is fish food.
Apparently, it was a source of cheap protein during wars, but didn't provide enough nutrients and tastes like pond scum. It ended up in the supplement sector because it was easier to get approved as it over food. Soylent Green was inspired by it.
I hope it does go back into the fish food sector - it's cheap and nutritious but tastes worse than soy.
? soy is a major ingredient in farm-fish food