This report summarises the scientific and consultation work undertaken to identify a new species name (Octopus djinda) and new common name (Western Rock Octopus) for the species that supports Australia’s largest octopus fishery, with 734 tonnes harvested in 2022. The species had been previously referred to as Octopus cf. tetricus, or Octopus aff. tetricus, otherwise known as the Gloomy Octopus. The species is endemic to Western Australia, and the work was a collaboration between the Western Australian Fisheries and Marine Research Laboratories (Dr Anthony Hart) and Dr Michael Amor of the Royal Botanic Gardens Victoria and the Western Australian Museum. Type specimens including males and females were sampled from across the species distribution in Western Australia, including from Geraldton, Mandurah, and Esperance. Using the latest technology in evolutionary genetics and multivariate morphology, the specimens were analysed, and a scientific manuscript proving they were a unique species was submitted to the journal Zootaxa. The species’ Holotype and Paratypes were then deposited in the Western Australian Museum. Parallel to this, a stakeholder consultation process investigated a range of options for species names and common names. The new species is now called Octopus djinda, and the new common name is Western Rock Octopus. The name “djinda” is a Noongar word for star, and the Noongar are traditional custodians of the land in South-Western Australia. The description provided by this project will enable proper reporting of catch statistics for Australia’s largest and fastest growing octopus fishery.