In this article, the results of the research project Model of Evaluation of the Productive Fishing Unit in Isla Fuerte (Cartagena, Colombia) are showed. This research was made to estimate the real supply of fishing resources in the surrounding area; to study the opportunity of establishing a cooperative enterprise of fishermen (inhabitants of the island); as well as contributing in the consolidation of local economy and strengthening commercialization of fishing products towards national and regional markets, looking for a sustainable fishing operation in this small island of the Colombian Caribbean.