The Regulation of Industrial and Sanitary Inspection of Products of Animal Origin (RIISPOA) guides the inspection and control of industrial animal processing establishments and there are enterprises that still do not meet their requirements. This study aimed to analyze the technical and economic feasibility adapting a fish-processing unit by RIISPOA requirements. The project localized in Augusto Corrêa (01°01’27’’S – 46 ° 39’14’’W), Pará state, operates exclusively with marine fish from extractive activities and mainly sells frozen fish fillet. Between January and August 2018 field observations were made to collect information regarding the industrial plant and the operational flow chart. Subsequently, an economic analysis carried out based on the operational cost of production methodology and economic efficiency indicators. It founded that the built area of the enterprise was 325.02 m2. The main processed species were: corvina (Cynoscion virescens), uritinga (Sciades proops), gó hake (Macrodon ancylodon), gurijuba (Sciades parkeri) and yellow hake (Cynoscion acoupa). The physical structure and operational flowchart of the processing were not in compliance with the regulation, mainly due to the lack of good manufacturing practices, standard hygiene procedures and hazard analysis and critical control points. It concluded that the adequacy is feasible from a technical and economic aspect, despite requiring high financial investment in infrastructure and adoption of programs aimed at quality control.