HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsFlathead perch Flathead perch (Rainfordia opercularis) Scientific name: Rainfordia opercularis McCulloch, 1923 The Flathead perch (Rainfordia opercularis) is a marine fish of the family Serranidae. Native range: Indo-West Pacific, endemic to Australia. BiologyOccurs inshore. Found in caves of coral reefs. Benthic. Secretive.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameRainfordia opercularisFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0EnvironmentMarine; reef-associatedClimateTropicalDistributionIndo-West Pacific: endemic to AustraliaConservation status (IUCN)Least Concern (LC)Threat 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