The seafood industry generates voluminous amounts of waste including both solid discards as well as wastewaters which are released as process effluents. Processing wastewaters are typically high in biochemical oxygen demand (BOD5), chemical oxygen demand (COD), organic matter, suspended solids, nutrients, and ammonia nitrogen. Consequently, the direct discharge of these waste streams has the potential to degrade receiving water environments through localized depletions of dissolved oxygen, eutrophication, and aquatic toxicity. At the same time, these effluents are rich in nutrients including proteins, amino acids, lipids containing good proportions of polyunsaturated fatty acids (PUFA), carotenoids, and minerals. Thus, it appears obvious that these wastes should be subjected to secondary processing and valorization in order to address these problems. In this context, the objective of this study was to conduct a preliminary assessment of the valorization and reuse potential of seafood processing effluents of an industrial plant located in Boulogne sur Mer in northern France through physical-chemical (pH, conductivity, chemical oxygen demand (COD), dry matter and ash content), biochemical (protein content and composition) and microbiological characterization. Effluent concentration ranges were dry matter (2 to 15%) composed mainly of proteins, conductivity (4 – 6 mS/cm), and COD (10000 to 22500 mg L−1 ). The characteristics of these effluents will make it possible to direct the appropriate processes aimed at the water reuse and protein recovery from these effluents.