Be wary of intrinsic thinking. Something may not be intrinsic, but still be the expected result.

In principle, wild harvests are not intrinsically harmful to the environment. In practice, all commercial fisheries are to various degrees.

Large scale aquaculture has a ton of issues. Disease, nutrition, pollution. Not intrinsic, but practically.

That said, I do think we can attain a decent quality of aquaculture. The best commercial approach is currently freshwater fish grown in isolation from natural water sources with waste water used for irrigation. Tilapia, basically.

Problem is, people want salmon, cod, tuna, oysters... Salmon is farmed at scale. We know the result. Very high parasite loads. Visibly reduced health of the fish. Nutritional issues.

We could easily farm a different species, that naturally thrives in environments similar to those we can recreate agriculturally... the demand is for salmon.

> We can craft nutritious, similar-to-natural, or even better, fish foods.

Citation needed. There have been trillions spent on meal replacements/supplements for humans and it never beats eating a variety of raw, unprocessed foods, like fruits and veg.

you are right but "citation needed" isn't a polite way of responding to a comment. This isn't a wikipedia editing battle.