This is an improvement to some other practices - and I like the artificial ecosystem option in the last section the best - but it's definitely a big step down compared to wild-caught fish!

I eat wild-caught fish every single day, and one of the reasons (besides the inherent healthfulness of this type of meat) is that you can scarcely find any antibiotics-etc.-free meat anymore, and buying an organically raised chicken is quite expensive (a medium-sized responsibly raised chicken will cost ~8 euro; in comparison, 2 kilos of wild-caught chub mackerel - a fish that's very similar in its healthy oils to salmon - will cost 3 euro).

For people who can't hunt and aren't rich, fish is basically the only affordable wild-caught meat option remaining.