x     Argentine and Uruguayan scientists are launching the South Atlantic Shark Conservation Initiative, a collaborative research expedition to secure stronger legal protections for sharks in the Southwest Atlantic, a region critical for marine biodiversity. Uruguay's waters are globally significant, harboring nearly 10% of the world's shark and ray diversity (elasmobranchs). Conservation of large marine predators like the sand tiger shark (escalandrún), sevengill shark (gatopardo), and dusky