@grrlscientist this is generally very true. Most farms are pretty terrible. There are a few that are trying to be better but the best I've found is ora king salmon from New Zealand. Most of their practices actually mitigate the worst practices of most farms. I work in a seafood restaurant that will only source wild or ora king. Their feed practices are way better than all the others. Just an FYI cause I really like their practices.

https://globalseafoods.com/blogs/news/farming-ora-king-salmon

Edit: added a link