HomeFish encyclopediaRay-finned fishesPerch-like fishSleepersMarine gudgeon Marine gudgeon (Thalasseleotris adela) Scientific name: Thalasseleotris adela Hoese & Larson, 1987 The Marine gudgeon (Thalasseleotris adela) is a brackish-water fish of the family Eleotridae. Native range: Indo-West Pacific, southern Australia. BiologyFound in rocky reefs in coastal bays and estuaries, often in silty habitat. Secretive.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThalasseleotris adelaFamilyEleotridae (Sleepers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Depth range1–20 m (3–66 ft)EnvironmentMarine; brackish; reef-associated; depth range 1 - 20 mClimateSubtropicalDistributionIndo-West Pacific: southern Australia.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