HomeFish encyclopediaLampreysLampreysLampreysPit-Klamath brook lamprey Pit-Klamath brook lamprey (Lampetra lethophaga) Scientific name: Lampetra lethophaga Hubbs, 1971 The Pit-Klamath brook lamprey (Lampetra lethophaga) is a freshwater fish of the family Petromyzontidae. Native range: North America, Klamath River in south central Oregon and Pit River in northeastern California, USA. BiologyDorsal spines: 0; Anal spines: 0. Four pairs of lateral tooth plates; supra oral plate with 3 dull cusps.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLampetra lethophagaFamilyPetromyzontidae (Lampreys)OrderPetromyzontiformes (Lampreys)ClassCephalaspidomorphi (Lampreys)Maximum length22.0Common length14.0EnvironmentFreshwater; demersal; non-migratoryClimateTemperateDistributionNorth America: Klamath River in south central Oregon and Pit River in northeastern California, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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