HomeFish encyclopediaRay-finned fishesPerch-like fishTemperate perchesMary River cod Mary River cod (Maccullochella mariensis) Scientific name: Maccullochella mariensis Rowland, 1993 The Mary River cod (Maccullochella mariensis) is a freshwater fish of the family Percichthyidae. Native range: Oceania, River Mary in Queensland, Australia. Not dealt with in the 2000 Red List. Considered endangered. Species factsScientific nameMaccullochella mariensisFamilyPercichthyidae (Temperate perches)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)EnvironmentFreshwater; demersalClimateSubtropicalDistributionOceania: River Mary in Queensland, Australia. Not dealt with in the 2000 Red List. Considered endangered.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceVery Low, minimum population doubling time more than 14 years (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