Oxydoras

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

There are currently three recognized species in this genus:

• Oxydoras kneri Bleeker, 1862
• Oxydoras niger (Valenciennes, 1821) (Ripsaw catfish)
• Oxydoras sifontesi Fernández-Yépez, 1968

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).