HomeFish encyclopediaRay-finned fishesSmeltsGalaxiidsGiant kokopu Giant kokopu (Galaxias argenteus) Scientific name: Galaxias argenteus Gmelin, 1789 The Giant kokopu (Galaxias argenteus) is a freshwater fish of the family Galaxiidae. Native range: Southwest Pacific, endemic to New Zealand. Species factsScientific nameGalaxias argenteusFamilyGalaxiidae (Galaxiids)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length40.0EnvironmentMarine; freshwater; brackish; demersal; amphidromousClimateSubtropicalDistributionSouthwest Pacific: endemic to New Zealand.Conservation status (IUCN)Vulnerable (VU) (C2a)Threat to humansHarmlessUsesFisheries: commercial; gamefish: yesResilienceHigh, 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