Fishermen have encountered Cape fur seals in the Keurbooms River estuary for many years and there are numerous anecdotal reports of them preying on important recreational fish species that are also of conservation concern. In the past, due to public pressure, this has led to the selective removal of so called ‘rogue’ seals by river management authorities. However, the existence of river-specialists, whether such individuals have a greater impact on estuarine fish species than individuals in the general population, and the potential effect of their removal, has not been examined. We facilitated dedicated boat-based surveys to monitor the presence, individual identity and behaviour of these seals since 2017, and since 2018 with help from the ORCA Foundation. Using photo-ID techniques we are now able to study the presence of individuals with uniquely identifiable flipper scars. Prey species are being identified from photos that were taken during predation events. With this we aim to determine whether individual seals specialize in feeding on estuarine fish species, and whether their behaviour is seasonal, tidal, sex or age specific. The study further aims to place the potential impact of river seals into context with current recreational and subsistence fishing pressure, and illegal gill-netting, which was also recorded.