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Corydoras undulatus Regan, 1912

Image contributors to this species:

C.H.Bishop (5) Ian Fuller (1) Allan James (1) Vedran Cuncic (1)

ScotCat Sources:

Etymology = Genus Etymology = species

Other Sources:

Fishbase  Google Search  All Catfish Species Inventory

Relevant Information:

The fish in the first first 5 images were collected by the image contributor Carlos Bishop in the Corrientes province of N.E.Argentina near the Paraguayan border. They were caught in densely planted areas with a gravel bottom, the water was quite limpid and they are always living alongside C. aeneus and C. paleatus. In the winter the water temperature gets down to between 10 to11ºC (47-49ºf) and even as low as 7 to 8ºC (39-43ºf). Seemingly wild hybrids with C. aeneus are very common. There is a similar looking species from the Mato Grosso in Brazil which has been given the C-number code of C088. Aquarium care: This is akin to most of this genus, very peaceful, and would be best housed with small to medium tank mates such as Tetras, Rasboras and Danios or in a species tank for breeding purposes. Diet: A good quality flake food and tablet food for adults with sporadic feedings of frozen or live food will keep your Corydoras in good health. Remarks: Lower temperatures in the aquarium will be beneficial to this species. CW022 has now been redescribed as being a colour form of C. undulatus (Bono A. et al. 2019).

Common Name:







South America: Argentina; Paraná River Basin, Buenos Aires, La Plata.


5.5cm ( 2¼ins)


20-25°C (67 -77°F)


6.0 -7.2.


ScotCat Article: Collecting in the Paraná River Basin, Argentina (Part 2)
Bono A, Caserta Tencatt LF, Alonso F, Lehmann A. P
(2019) Redescription of Corydoras undulatus Regan, 1912 (Siluriformes: Callichthyidae), with comments on the identity of Corydoras latus Pearson, 1924. PLOS ONE 14(1): e0211352. https://doi.org/10.1371/journal.pone.0211352



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