Now, this means big money, and big problems. Yes, because salmons have to be fed, so wild fish is caught to feed them, with the proportion of 4 kilos of wild fish to produce 1 kilo of salmon. Onzin.
Next, these aquacultured animals end up eating and shitting in the very same space, so the water gets just crap and the bottom ... well just imagine having a huge loo for all the inhabitants of your building, right undernith you... A desert of shit!
Salmon sandwich? well, may I have some bread and... cheese perhaps?