The blue corydoras or Natterer's catfish (Corydoras nattereri) is a tropical freshwater fish belonging to the Corydoradinae sub-family of the Callichthyidae family. It originates in coastal rivers in South America, and is found in the Brazil from Espírito Santo to Paraná. It is named for Johann Natterer, its discoverer.
The fish has clear fins with no pattern. The ventrals are light, opaque yellow. Highlights seen about the gill plates are green. The belly is yellowish. It has a pronounced dark stripe along the length of the body. General color of the body is light, tending towards yellow. Its eyes are gold. It will grow in length up to 5.4 centimetres (2.1 inches).
It lives in a tropical climate in water with a 6.0 – 8.0 pH, a water hardness of 2 – 25 dGH, and a temperature range of 20–23 °C (68–73 °F). It feeds on worms, benthic crustaceans, insects, and plant matter. It lays eggs in dense vegetation and adults do not guard the eggs.
The blue corydoras is of commercial importance in the aquarium trade industry.
- Froese, Rainer and Pauly, Daniel, eds. (2011). "Corydoras nattereri" in FishBase. December 2011 version.
- William T. Innes (1966). Exotic Aquarium Fishes, 19th Edition. Maywood, New Jersey: Metaframe Corporation, Division of Mattel, Inc. p. 249.
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