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Report | December 8, 2025
Ten years later: Brussels restaurants still serving mislabelled seafood
Using DNA methods, Oceana sampled fish and squid sold in restaurants in Brussels, including in the canteens of the European Parliament and the European Commission. Ten years after we first investigated seafood mislabelling in Brussels, the results reveal that information provided to consumers about seafood is frequently lacking or misleading.
Has fish mislabelling improved in Brussels? In 2015, Oceana carried out a research study in partnership with the University of Leuven, in which we investigated the mislabelling of fish sold in restaurants across Brussels.1 The results were sobering: 30% of all samples were mislabelled, and 95% of bluefin tuna (Thunnus thynnus) samples were substituted by the more common and cheaper yellowfin tuna (Thunnus albacares) and bigeye tuna (Thunnus obesus). Data had been gathered from 280 restaurant samples across Brussels, including the canteens of the European Parliament and the European Commission. Our findings showed that fish mislabelling was generalised across Brussels, revealing weaknesses of seafood labelling and traceability systems.
