HomeFish encyclopediaRay-finned fishesPerch-like fishAsiatic glassfishesPennyfish Pennyfish (Denariusa australis) Scientific name: Denariusa australis Steindachner, 1867 The Pennyfish (Denariusa australis) is a freshwater fish of the family Ambassidae. In the aquarium it needs water at 22–32°C (72–90°F). Native range: Oceania, Australia and Papua New Guinea. Pennyfish care at a glanceTemperature22–32°C (72–90°F) BiologyDorsal spines (total): 8; Dorsal soft rays (total): 9-10; Anal spines: 3; Anal soft rays: 7 - 9Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDenariusa australisFamilyAmbassidae (Asiatic glassfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length4.5Common length3.5EnvironmentFreshwater; demersalClimateTropicalDistributionOceania: Australia and Papua New Guinea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026