White sharks are long-lived apex predator that has been under conversation protection in Australia since the late 1990s, when a recovery plan was put in place given grave concerns over the status of the population. A major challenge for this (and other) recovery plan(s) was how to actually reliably estimate the abundance of the population. White sharks are hard to observe, relative to smaller more abundance species, so a new method was required to reliably estimate population abundance. Close-Kin Mark-Recapture uses the detection of close relatives (in this case half-siblings) and embeds these data within a mark-recapture estimation framework to estimate adult abundance, mortality rates and population trends over time. For the East Australian/New Zealand and West Australian parts of the population a comprehensive set of CKMR-derived estimates of adult population size was undertaken by CSIRO and various state and international colleagues and first released in 2018, and then revised with further samples and released in 2019. The kinship data derived from collected samples was consistent with a breeding population divided into two segments as original population genetics studies. It was estimated that the East Australasian part of the population had around 750 adults (with a range of 479-1,030) and the West Australian part of the population had around 1,460 adults (with a range of 760-2,250). In this talk we outline the key features of this project, initial estimates of the entire Australasian White Shark population, and the development of cost-effective future monitoring programs to use CKMR to track future changes in the size and status of the population.