HomeFreshwater aquarium fishCatfish & plecosRineloricaria fallax Rineloricaria fallax Scientific name: Rineloricaria fallax Steindachner, 1915 Rineloricaria fallax is a freshwater fish of the family Loricariidae that grows to about 15.5 cm (6.1 in). It is easy to keep and peaceful, suits community aquariums and needs a tank of at least 115 L (30 US gal), water at 18–26°C (64–79°F) and a pH of 5.8–7.8. Native range: South America, Upper Rupununi and Branco River basins. Rineloricaria fallax care at a glanceCare levelEasyTemperamentPeacefulCommunity tankGoodAdult size15.5 cm (6.1 in)Minimum tank115 L (30 US gal)Temperature18–26°C (64–79°F)pH5.8–7.8Hardness5–20 dGH (89–357 ppm)DietOmnivore. Accepts flakes, sinking pellets, frozen foods and brine shrimp. Species factsScientific nameRineloricaria fallaxFamilyLoricariidae (Armored catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length15.7EnvironmentFreshwater;; pH range: 5.8 - 7.8; dH range: ? - 20 demersalClimateSubtropicalDistributionSouth America: Upper Rupununi and Branco River basins.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceLow, minimum population doubling time 4.5 - 14 years (Fec = 100) More catfish & plecosGolden otocinclusMacrotocinclus affinisWhiptail catfishFarlowella acusReticulated corydorasCorydoras reticulatusPeppered corydorasCorydoras paleatusBluespotted corydorasCorydoras melanistiusLeopard corydorasCorydoras juliiSee all catfish & plecos SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026