HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsBlowhole perch Blowhole perch (Caesioscorpis theagenes) Scientific name: Caesioscorpis theagenes Whitley, 1945 The Blowhole perch (Caesioscorpis theagenes) is a marine fish of the family Serranidae. Native range: Eastern Indian Ocean, Endemic to the west coast of Australia. BiologyOccurs inshore. Inhabits coral reef and rock reef.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCaesioscorpis theagenesFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)EnvironmentMarine; reef-associated; non-migratoryClimateTemperateDistributionEastern Indian Ocean: Endemic to the west coast of Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 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