Skates (Rajiformes) rank among the most threatened group of chondrichthyans, owing to their low biological productivity, late maturity, and often restricted distribution, which elevate their vulnerability to overfishing and habitat destruction; yet they remain comparatively under-researched, poorly managed, and neglected relative to sharks across much of the world. Accurate age and growth information such as longevity, size-and-age at maturity, and growth rate, is fundamental for estimating mortality and productivity, and for informing managers in making critical decisions for conservation of threatened species. However, such knowledge remains lacking or unresolved for many under-assessed skates, including an endemic Southeast Australian skate: the critically endangered longnose skate (Dentiraja confusa). This study aims to fill these key knowledge gaps by generating growth parameters, which will directly assist population studies and support appropriate, species-specific conservation measures. Samples for this study were collected during CSIRO research cruises operations in the Eastern part of the Southern and Eastern Scalefish and Shark Fishery (SESSF) zone between 2023 and 2025. The specimens will be used to determine age from concentric growth band-pair counts on sectioned vertebral centra, with two independent readers utilised to circumvent bias and improve precision via coefficient of variation and average percent error. Finally, growth parameters will be estimated using Bayesian multi-model inference, comparing growth model performance between males and females. The size-and-age at maturity will be determined by fitting logistic regression, a maturity ogive, to determine age and length when 50% of the individuals get matured. This research will provide baseline information on the species' growth, age, and maturity, and will validate the periodicity of band formation. These findings will fill key knowledge gaps required for population demographic studies, enabling evaluation of fishing risks and vulnerability assessments, as well as form comparisons with similar sized species.