The purpose of this study was to analyze the dynamic of dimensions that characterize an undertaking of solidarity economy in a family farming system, especially in the ambit of principles of sustainable development, namely, self-management, direct democracy, effective participation, educational actions, cooperation at work, and equalitarian distribution of results and benefits. A qualitative case study was performed at the Association of Aquaculture and Artisanal Fishermen of Guassussê in the countryside of the State of Ceará, Brazil. According to results, it was possible to reveal the existence of the analyzed dimensions, as well as their relationships and effects. Therefore, we emphasize that this association configures as a reliable undertaking which has found objective and creative solutions for issues which affect the northeast of the State of Ceará in a self-managed, autonomous and pioneer way.