Oxydoras is a genus of thorny catfishes native to tropical South America.

There are currently three recognized species in this genus:[1] Oxydoras species are relatively large, reaching between 70–100 centimetres (28–40 in) in length.

O. kneri has a maximum published weight of 9 kilograms (20 lb).

O. niger gets even heavier, with a maximum published weight of 13 kilograms (29 lb).

This family Doradidae article is a stub.