Dipturus mennii

Dipturus mennii, commonly known as Menni's skate, is a cartilaginous fish species belonging to the family Rajidae. This bottom-dwelling elasmobranch is endemic to the southwestern Atlantic Ocean, specifically found along the continental shelf and slope waters off Argentina and Uruguay. The species inhabits depths ranging from approximately 70 to 540 meters, preferring sandy and muddy substrates where it feeds on small fish, crustaceans, and other benthic invertebrates. Menni's skate is characterized by its flattened body, elongated snout, and distinctive pectoral fins that extend along the sides of its disc-shaped form. Like other skate species, it reproduces through internal fertilization and lays egg cases, making it particularly vulnerable to population declines due to its slow reproductive rate and late sexual maturity. The species faces severe threats primarily from commercial fishing activities, particularly bottom trawling operations that target other commercially valuable fish species in the region. Bycatch mortality represents the most significant threat to Dipturus mennii populations, as these skates are frequently caught incidentally in fishing nets and often discarded. The limited geographic range of this endemic species further compounds its vulnerability to extinction. Currently, there are no specific conservation measures in place for Menni's skate, though some protection may be afforded through general fisheries management regulations in Argentine and Uruguayan waters. Research efforts to better understand the species' biology, distribution, and population status remain limited.