HomeFreshwater aquarium fishOther freshwater fishHeadwater killifish Headwater killifish (Profundulus candalarius) Scientific name: Profundulus candalarius Hubbs, 1924 The Headwater killifish (Profundulus candalarius) is a freshwater fish of the family Profundulidae. Native range: Central America, Guatemala, Mexico. BiologyNot a seasonal killifish. Is very difficult to maintain in aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameProfundulus candalariusFamilyProfundulidae (Middle American killifishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length8.0EnvironmentFreshwater; benthopelagic; non-migratoryClimateTropicalDistributionCentral America: Guatemala, Mexico.Conservation status (IUCN)Near Threatened (NT)Threat to humansHarmlessUsesAquarium: commercial More other freshwater fishLined soleAchirus lineatusPumpkinseedLepomis gibbosusShort-tailed pipefishMicrophis brachyurus brachyurusFinescale tigerfishDatnioides microlepisFreshwater garfishXenentodon cancilaSouth American lungfishLepidosiren paradoxaSee all other freshwater fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026