HomeFish encyclopediaRay-finned fishesPerch-like fishSleepersCran's bully Cran's bully (Gobiomorphus basalis) Scientific name: Gobiomorphus basalis Gray, 1842 The Cran's bully (Gobiomorphus basalis) is a freshwater fish of the family Eleotridae. In the aquarium it needs water at 4–22°C (39–72°F). Native range: Oceania, endemic to New Zealand. Cran's bully care at a glanceTemperature4–22°C (39–72°F) Species factsScientific nameGobiomorphus basalisFamilyEleotridae (Sleepers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length9.0EnvironmentFreshwater; demersal; non-migratoryClimateTemperateDistributionOceania: endemic to New Zealand.Threat 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