DESCRIZIONE
Enriching a mollusc filterer in polyunsaturated fatty acids and/or carotenoids, comprises setting the mollusc filterer in a sea water basin and adding microalgae of interest in the sea water basin, where the microalgae interest is previously selected and grown and contains at least 2 wt.% of polyunsaturated fatty acids. Independent claims are included for: (1) refining an oyster consumption comprising refining the oyster in sea water basin in the presence of the microalgae of interest for a time sufficient for the fixed oyster polyunsaturated fatty acid and/or carotenoids content in the microalgae; (2) the mollusc filterer obtained by the method; and (3) the oyster obtained by the method.