HomeFreshwater aquarium fishGuppies & livebearersVariable lampeye Variable lampeye (Procatopus similis) Scientific name: Procatopus similis Ahl, 1927 The Variable lampeye (Procatopus similis) is a freshwater fish of the family Poeciliidae. In the aquarium it needs water at 24–26°C (75–79°F). Native range: Africa, Southern Nigeria, west and east Cameroon southward to the Lokundje river. Variable lampeye care at a glanceTemperature24–26°C (75–79°F) BiologyDorsal soft rays (total): 9-13; Anal soft rays: 15 - 19Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameProcatopus similisFamilyPoeciliidae (Poeciliids)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Common length5.5EnvironmentFreshwater;; pH range: 6.0 - 8.0; dH range: 5 - 12 benthopelagic; non-migratoryClimateTropicalDistributionAfrica: Southern Nigeria, west and east Cameroon southward to the Lokundje river.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More guppies & livebearersPoecilia wingeiBold characodonCharacodon audaxBluetail goodeaAtaeniobius toweriButterfly splitfinAmeca splendensMollyPoecilia sphenopsSouthern platyfishXiphophorus maculatusSee all guppies & livebearers SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026