The National Institute of Fisheries Research and Development (INIDEP) has launched a 14-day winter evaluation campaign to study blonde croaker (Micropogonias furnieri) in the Río de la Plata and the Argentine-Uruguayan Common Fishing Zone. Led by Lic. Rita Rico and conducted aboard the Oceanographic Fisheries Research Vessel Mar Argentino, the campaign aims to estimate species densities and population structure. The study, which includes technical representatives from Buenos Aires and Uruguay, will also assess yellow croaker and other coastal species using acoustic data from a scientific echo sounder. This joint effort, crucial for the sustainability of the fishery, has been conducted intermittently since 1981 and will update essential ecological-fishery information.