HomeFreshwater aquarium fishCatfish & plecosSixray corydoras Sixray corydoras (Aspidoras pauciradiatus) Scientific name: Aspidoras pauciradiatus Weitzman & Nijssen, 1970 The Sixray corydoras (Aspidoras pauciradiatus) is a freshwater fish of the family Callichthyidae that grows to about 2.9 cm (1.1 in). It is difficult to keep and peaceful, is best kept in a species tank and needs a tank of at least 75 L (20 US gal), water at 22–25°C (72–77°F) and a pH of 6.0–7.2. Native range: South America, Upper Araguaia River basin in Brazil. Sixray corydoras care at a glanceCare levelDifficultTemperamentPeacefulCommunity tankNot suitableAdult size2.9 cm (1.1 in)Minimum tank75 L (20 US gal)Temperature22–25°C (72–77°F)pH6.0–7.2Hardness2–12 dGH (36–214 ppm)DietOmnivore. Accepts flakes. Species factsScientific nameAspidoras pauciradiatusFamilyCallichthyidae (Callichthyid armored catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length2.9EnvironmentFreshwater;; pH range: 6.0 - 7.2; dH range: ? - 12 benthopelagicClimateTropicalDistributionSouth America: Upper Araguaia River basin in Brazil.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More catfish & plecosPastaza corydorasCorydoras pastazensisPretty corydorasCorydoras pulcherPanda corydorasCorydoras pandaBlue corydorasCorydoras nattereriPygmy corydorasCorydoras pygmaeusMasked corydorasCorydoras metaeSee 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