In reply to mutt:
It's a while ago now, but in 2013/2014 some research I did for a diploma found there's a system in place to stop cod from being fished unsustainably now (I guess whether it's adhered to could be a different matter)
Edit: I stand corrected. It isn't sustainable currently.
https://www.sustainweb.org/news/oct19_mcsratings/
[[[ According to the latest advice, five of the most sustainable seafood species caught or farmed in the UK are:
Oysters, mussels and king prawns (UK-farmed): Some real delicacies are on our doorstep, and UK farmed shellfish is tasty and sustainable!
Atlantic halibut (UK-farmed): only look for farmed halibut from the UK as this species is endangered in the wild
Herring (Irish Sea – North): this population is in a good state, and fishing pressure is well within sustainable levels. Herring from the North Sea is also a good choice
Plaice (UK caught from the North Sea): populations here are increasing – a great sustainable choice
European Hake (UK caught): following low stock levels in 2006 and new measures being put in place, hake populations have bounced back and been consistently high over the last 10 years …a true success story!
Five of the least sustainable seafood species caught in the UK:
UK Cod: Look for cod from the North East Arctic or Iceland instead
European eel: This is a Critically Endangered species due to overfishing, habitat alteration and pollution. Whether farmed or wild caught, there are currently no sustainable options for this species ·
Wild Atlantic salmon: There are no rivers in England or Wales where salmon stocks are meeting conservation targets and only 28% of rivers in Scotland are doing so. Only consider salmon from Grade 1 rivers in Scotland or look for UK organic farmed salmon
Whiting caught from the west of the UK: All of these populations are below safe levels, meaning that their ability to reproduce is impaired. Whiting in the North Sea is doing a bit better, but even there it's being subject to slight overfishing
Wild Atlantic halibut: This amazing but endangered species is highly vulnerable to the impacts of fishing, avoid wild Atlantic halibut caught anywhere around the UK. MCS works closely with regulators, the fishing and aquaculture industry, retailers and the seafood supply chain to ensure the longevity of seafood stocks and the industries themselves.]]]
Post edited at 17:52