HomeFreshwater aquarium fishCatfish & plecosSkunk corydoras Skunk corydoras (Corydoras arcuatus) Scientific name: Corydoras arcuatus Elwin, 1938 The Skunk corydoras (Corydoras arcuatus) is a freshwater fish of the family Callichthyidae that grows to about 5 cm (2 in). It is peaceful, suits community aquariums and needs a tank of at least 75 L (20 US gal), water at 22–26°C (72–79°F) and a pH of 6.0–8.0. Native range: South America, Brazil, Ecuador, and Peru in the Amazon forest. Skunk corydoras care at a glanceTemperamentPeacefulCommunity tankExcellentAdult size5 cm (2 in)Minimum tank75 L (20 US gal)Temperature22–26°C (72–79°F)pH6.0–8.0Hardness2–25 dGH (36–446 ppm)DietOmnivore. Accepts flakes. Species factsScientific nameCorydoras arcuatusFamilyCallichthyidae (Callichthyid armored catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length4.0EnvironmentFreshwater;; pH range: 6.0 - 8.0; dH range: 2 - 25 demersalClimateTropicalDistributionSouth America: Upper Amazon River basin.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Fecundity is at least about 100 eggs) More catfish & plecosSpotted corydorasCorydoras ambiacusPink corydorasCorydoras axelrodiBanded corydorasScleromystax barbatusSpotback corydorasCorydoras blochiGuitarritaBunocephalus coracoideusTailspot corydorasCorydoras caudimaculatusSee 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