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The Good Fish Guide ratings reflect the Marine Conservation Society's opinion of the environmental performance of different wild and farmed seafood sources and are produced using our methodologies available here, drawing on publicly available, independent scientific advice and peer-reviewed literature wherever possible, as well as expert advice obtained through public consultations undertaken for all ratings.

While every effort is made to ensure ratings are regularly reviewed and are as accurate as possible, we accept no liability ​for any errors that may arise, nor any damages as a result of the use of the ratings.