HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesMarine hatchetfishesRugby hatchetfish Rugby hatchetfish (Polyipnus ruggeri) Scientific name: Polyipnus ruggeri Baird, 1971 The Rugby hatchetfish (Polyipnus ruggeri) is a marine fish of the family Sternoptychidae. Native range: Indo-West Pacific. Species factsScientific namePolyipnus ruggeriFamilySternoptychidae (Marine hatchetfishes)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length6.6EnvironmentMarine; benthopelagicClimateSubtropicalDistributionIndo-West Pacific.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