This paper presents the results from the ichthyofaunistic study carried out on the assemblages from El Tigre site and the San Antonio archaeological zone, focussing on assessing the importance of fish to the subsistence diet of the Late Holocene. A study based on previous partial analyses of these assemblages established that fish constituted an important resource in the diet during the final Late Holocene and that different species were differentially exploited according to their distribution in the area. Here we re-examine this data in light of new analysis carried on total sum of the assemblages. These studies confirm the trends proposed in relation to fish consumption and indicated an intensive exploitation of this resource during the final Late Holocene.