Aquaculture poses many unresolved questions and problems .... Pollution in particular, but also yield, diversity and quality of the finished product.
Exact: I saw an edifying report on this subject in Thalassa: the Norwegians raised salmon from the North Atlantic in the South Pacific (East of Patagonia - canals).
The local flora and fauna have been completely destroyed and the fish have caught an unknown virus hitherto certainly linked to the large number of fish ... etc ...
Frankly, until then I was fairly pro-farmed fish, but there it put my morale up, to see what comes from the seabed and the fish and shellfish from the area after such an invasion.
If I find the show I put it online, but Thalassa can not be seen for free on the internet, must buy the videos (I think it happened 2 weeks ago.
In my opinion, the fishing crisis is only one of the many symptoms of the total disconnection of our technological society with the reality of the Earth system (fragile ecosystems, global dynamics, limited resources, ...).
Well agree with you: it will be very hard for everyone (except the rich who travel by private Falcon plane from Dassault ) to return to reality.
Good for the rich, it must be said that they will have a little more hope in front of them and they will be able more easily to afford the new technologies without oil to move.