Commission decision 2002/226/CE may authorise the harvesting of Pectinidae belonging to the species Pecten maximus and Pecten jacobaeus with a domoic content in whole body exceeding 20 mg/kg but lower than 250 mg/kg, if contaminated parts are removed. The French regulatory authorities asked AFSSA to estimate the relevance for extending the scope of this decision to other phycotoxins contamining these two species and to other species. And if yes, can freezing process have an influence on phycotoxins anatomical distribution? From several studies performed on the genus Pecten found in the litterature, it is observed that digestive gland contains the highest level of toxins, then mantle and gills. Regarding contents found in gonad and adductor muscle, the concentrations are generally low and very low, respectively. However, compiled data from different studies performed on paralytic toxins contents in Pectinidae show that any constant correlation between tissues could not be established. Specific data regarding the both species Pecten maximus and Pecten jacobaeus are too limited to set a range of contents in the view of extend the scope of the Commission decision for lipophilic or paralytic phycotoxins. Moreover, some experimental studies on paralytic toxins have shown that during the detoxification period, kidneys can become highly toxic. And this particular organ can stay linked to the adductor muscle during the removal process from the whole body. Regarding the influence of freezing process, data from scallops Patinopecten yessoensis show a possible post mortem transfer or exchange from gonad to muscle. Are discussed also the effects of freezing/thawing on the integrity of shellfish tissues andon the stability of phycotoxins.