Study on the cooperation in the Spanish aquaculture acuicultura asociacionismo redes alianzas Cooperation aquaculture partnership networks alliances When a sectorial analysis of aquaculture is realized from a competitive point of view, it is necessary to speak about cooperative processes and the constitution of alliances since Porter proposes. Therefore, in this article we will comment as the cooperative agreements, its implicit or explicit character, the nature of the activities and resources put jointly, for finally, to define the cooperative interrelations. Our study of field or investigation on the cooperation has concentrated in Spanish Aquaculture, thus we have come to resist the raised hypotheses for a significant sample of companies, and the results are derived from the use of statistical package SPSS 15.0. 2010-07-15 Research article htm 090301 www.cyta.com.ar/ta/article.php?id=090301 es ADMG ADMG