Now that you have found the right assessment, it is important to understand how it is constructed. We distinguish between wild-caught fish, farmed fish and fish with a label.
Wild caught fish
With wild-caught fish, the final assessment is determined by the fish stock & fishing pressure (how much of a fish there is and how much is caught), the effects on the ecosystem (what effect the fishery has on other species and the habitat) and the management of the fishery (the laws and regulations and how strictly they are observed and monitored).

Farmed fish
For farmed fish, the final assessment is determined by the source use (the sustainability of feed and other materials), the impact on the environment (how harmful the farming is to the environment) and the management of the farm (the laws and regulations and how strictly they are observed and monitored).

Fish with a label
Some assessments do not have a colour rating, but instead carry an MSC or ASC label. These assessments are assessed separately by these organisations and therefore do not have a VISwijzer color. Most species with these labels are sustainable and you can eat them without doubt.

Fish in season
With most ratings, there is also a bar with all the months, which are coloured grey or turquoise. This does not say much about the sustainability, but it does show when a fish is of the best quality. Fish in season is best bought in the months that are coloured turquoise.