There is a great need within the fish industry for quick tools to measure origin, fat content and general quality right after landing. In SILLQUID, the fast and non-destructive method MWspectroscopy, developed in two recent EU-projects, was tested for prediction of origin, compositional and quality parameters of a unique herring material collected and analyzed during NI-project 02106. Through participation of three pelagic companies, the MW-tool was also tested during industrial production of herring and mackerel fillets.