they didn't eat raw salmon because unfrozen salmon has parasites. aquaculture salmon doesn't have these parasites, likewise deep freezing (as in -20°C for a we

they didn't eat raw salmon because unfrozen salmon has parasites. aquaculture salmon doesn't have these parasites, likewise deep freezing (as in -20°C for a week or -35°C for a day) makes it safe to eat. so they knew why they didn't eat raw salmon.