HomeFish encyclopediaRay-finned fishesPerch-like fishSleepersGraham's gudgeon Graham's gudgeon (Grahamichthys radiata) Scientific name: Grahamichthys radiata Valenciennes, 1837 The Graham's gudgeon (Grahamichthys radiata) is a marine fish of the family Eleotridae. Native range: Southwest Pacific, endemic to New Zealand. BiologyOccurs in rock pools and subtidal areas down to 50 m. Found in areas of sand or mud, associated with rocks, shells, or other partially buried objects.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGrahamichthys radiataFamilyEleotridae (Sleepers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.5Depth range0–50 m (0–164 ft)EnvironmentMarine; demersal; depth range 0 - 50 mClimateTemperateDistributionSouthwest Pacific: endemic to New Zealand.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