parasites in salmon and steelhead

[ported]

I lived on 2 fish farms in the late 80's. Both were small sites, 200 ton and 600ton facilities. We had our own "special" pen for bbq fish. We kept them off feed for at least 2 weeks to get rid of the feed taste in the meat.
The farms people should not eat from are mainly land based or mangrove swamp based(shrimp). Without great recirculation systems their water can be foul.