Salminus affinis is a species of freshwater ray-finnned fish belonging to the family Bryconidae, the dorados or jaw characins. This species is endemic to Colombia, where it occurs in the Magdalena-Cauca, Sinú, and Rancheria drainage systems. This benthopelgic fish reaches a maximum standard length of 46.5cm (18.3in) and has a maximum published weight of 2.3kg (5.1lb), although a fish with a total length of 80cm (31in) was caught by an angler in the Rio Naré, in the Rio Magdalena basin.

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