In collaboration with Migros, our partner Sustainable Fisheries Partnership (SFP) developed the assessment method for the "Fish from responsible sources" M-Check. Further information on the assessment criteria is available at www.m-check.ch.
SFP carries out the assessments. SFP places a huge emphasis on transparency. All of the assessments can be viewed on FishSource and the assessment methodology can also be found on the same home page.
If you are interested in finding out how a FishSource rating is converted into M-Check stars, an explanation is provided on the M-Check for fish web page.