Development in the fisheries sector particularly post-harvest sub-sector has failed to deliver many of its promises to fisherfolks in Nigeria. The policies imposed from above by international agencies and central governments have been sadly at variance with the preference, needs and constraints of fisherfolks. Hence, technologies introduced are not adopted. Processing activities over the years evolved through application of indigenous knowledge (IK) practices but development interventions do not consider these in policy framework. This book specifies the underlying factors that predispose fish processors to use indigenous knowledge practices and the catalogue of indigenous knowledge practices used in fish processing in Nigeria. It contributes tremendously to IK literature as it provides rare sources and practices in post-harvest sector. This book is for development programme managers and project leaders who wish to incorporate an indigenous knowledge element into their work. It offers a continuous spectrum of approaches and tools, from those useful to persons seeking a quick and limited IK component, to those interested in a more long-term and thorough IK investigation.