6, see text Semaprochilodus is a genus of South American freshwater fish in the family Prochilodontidae.

They have sometimes been included in the genus Prochilodus instead.

Depending on the exact species, they reach a maximum length of 27–54 centimetres (11–21 in).

[1] They support important fisheries and based on a review by IBAMA, they are the second (after Brachyplatystoma vaillantii) most caught fish by weight in the Brazilian Amazon.

[2] FishBase recognizes the following species in the genus:[1]