A collaborative campaign by INIDEP and DINARA, supported by the Argentine Naval Prefecture, aimed at studying the species composition and reproductive stages of cartilaginous fish in the Argentine-Uruguayan Common Fishing Zone. Conducted on the Argentine Sea vessel, the campaign gathered information on seawater parameters, fish species, and maturity stages, and also collected samples for studies on various marine resources and pollutants. The findings are expected to provide insights into the potential of the vessel for multi-species evaluation and the knowledge of the area and species in the closed area and shallow waters of national and provincial jurisdiction.