Its status is otherwise largely unknown. Predators of the species are also unknown. Though crested bullhead shark ("Heterodontus galeatus") are known to prey upon Port Jackson shark embryos, the biggest threat is probably from other sharks such as white sharks and the broadnose sevengill shark ("Notorynchus cepedianus"). In June 2018 the New Zealand Department of Conservation classified the Port Jackson shark as "Vagrant" with the qualifier "Secure Overseas" under the New Zealand Threat Classification System.