The waters of South Africa are home to a diverse array of sharks, many of which are data-deficient, endemic and/or threatened – and its southern cape harbors one of the world’s largest marine reserves, the De Hoop Nature Reserve (DHNR). As fishing pressure in the area increases, this region has become a research and conservation priority. Though bony fish and whales in De Hoop have been the focus of significant research effort, there is a knowledge gap in the biology and ecology of the region’s sharks, many of which are endemic to the country or severely threatened. These endemic species include the puffadder shyshark (Haploblepharus edwardsii), dark shyshark (Haploblepharus pictus), leopard catshark (Poroderma pantherinum), and pyjama catshark (Poroderma africanum). Though not an endemic species, the smooth hammerhead (Sphyrna zygaena) has also been identified as threatened in this area. While sharks are protected within the reserve, the reef habitat they occupy extends outside its boundary, eastward for approximately five km; in this unregulated area, sharks are vulnerable to shark longline fishing occurring there. This project is using a combination of passive acoustic telemetry and baited remote underwater video surveys (BRUVS) to investigate to study the habitat use of endemic and threatened sharks in the reserve and to determine if extending the DHNR boundary to include the entire reef will provide direct protections for these endemic and/or threatened species. SRC research and collaborators are currently providing these data to Cape Nature, the organization that manages the DHNR, to assess the effectiveness of the MPA’s design. This project is supported through grants from the Shark Conservation Fund, the Ocean Tracking Network and the Rock the Ocean Foundation. SRC research collaborators include Chris and Monique Fallows, the South African Institute for Aquatic Biodiversity and South Africa’s Acoustic Tracking Array Platform (ATAP).