Menni's Skate

Dipturus mennii is a large bottom-dwelling skate belonging to the family Rajidae, characterized by a flattened cartilaginous body, angular pectoral fin disc, and a long, slender tail. Like other rajiforms, it moves across the seafloor using undulations of its pectoral fins and feeds on benthic invertebrates and small fishes, using its crushing dentition to process crustaceans and molluscs. As a mid-level predator, it plays a role in structuring benthic communities and serves as a link between invertebrate prey populations and larger predators.

This species inhabits marine waters along the continental shelf and upper slope, typically over soft sediment substrates where it forages and rests partially buried in sand or mud. Its known range spans continental shelf waters off Brazil and Australia, though as with many skates, its full distribution and depth range may be incompletely documented.

The primary threat to Dipturus mennii is ongoing fishing and harvesting of aquatic resources, particularly incidental capture as bycatch in demersal trawl fisheries operating across its range. Skates are especially vulnerable to overexploitation due to their slow growth, late maturity, and low reproductive output, meaning populations recover slowly from fishing pressure.

Specific targeted conservation programs for this species are not well documented, though it may benefit indirectly from broader fisheries management measures, bycatch reduction efforts, and marine protected areas established within its range in Brazilian and Australian waters.

Current population trends are decreasing, and the species is classified as Critically Endangered. Given continued fishing pressure across its habitat and the biological constraints typical of large skates, its conservation outlook remains poor without targeted management intervention.

Menni's skate inhabits continental shelf and slope waters of the southwestern Atlantic Ocean off Argentina and Uruguay at depths of 70-540 meters. The species prefers sandy and muddy bottom substrates where it feeds on benthic invertebrates and small fish.