Cnesterodon raddai, the Resistencia toothcarp, is a species of poeciliid native to the Paraguay and lower Paraná River basins.

[1] This species reaches a length of 2.3 cm (0.91 in) TL.

[2] The species name was named after zoologist and virologist Alfred C. Radda (1936–2022), of the University of Vienna, who was the first to identify this species.

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