| Common name | Pacu |
| Language | Portuguese |
| Dialect | Tupi |
| Type | Vernacular |
| Official trade name | No |
| Rank | 3 - (Other common name) |
| Country | Brazil |
| Locality | Lower Tocantins River |
| Ref. | Mendes dos Santos, G.M.C., M. Jégu and B. de Merona, 1984 |
| Life stage | juveniles and adults |
| Sex | females and males |
| Core | behavior |
| 1st modifier | |
| 2nd modifier | |
| Remarks | From 'pag' + 'u' = the one that eats fast (Bueno, 1998) |