Hannia is a monotypic genus of fish in the family Terapontidae containing the single species Hannia greenwayi. Common names include Greenway's grunter. It is endemic to Australia, where it is known only from the Hann River.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0