I agree.
They touch on the sea lice issue with salmon farming, the Scottish farms as you know from the documentary; shameful indeed. Have you seen how caviar is produced, equally bad. You mention shrimp too, another good example as is slicing off shark fins for shark fin soup...do the research on that...it's disgusting. So many other cases.
Drag-net fishing is indiscriminate, as is net fishing in general and with so much bycatch being tossed back dead into the ocean it has a massive negative effect as you know from the documentary...shameful, irresponsible behaviour; but that's humans for you.
Thanks for commenting, I'm Glad you've seen the documentary.