Because the long chain FA come from the algae, not from the fish... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920940/ https://www.ncbi.nlm.nih.gov/pmc/arti

Because the long chain FA come from the algae, not from the fish... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920940/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920940/ So your pond raised salmon may lack some of the benefits.