HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesKnysna sandgoby Knysna sandgoby (Psammogobius knysnaensis) Scientific name: Psammogobius knysnaensis Smith, 1935 The Knysna sandgoby (Psammogobius knysnaensis) is a brackish-water fish of the family Gobiidae. Native range: Southeast Atlantic and Western Indian Ocean, South Africa. BiologyAn estuary sand dweller occurring in tidal parts of rivers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePsammogobius knysnaensisFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length7.0EnvironmentBrackish; demersalClimateSubtropicalDistributionSoutheast Atlantic and Western Indian Ocean: South Africa.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