. . . . . . . "Actinopterygii" . . . . "Animalia" . "Pacu" . "Characiformes" . . "(Holmberg 1887)" . . "Characidae" . "Piaractus" . . . "Piaractus mesopotamicus (Holmberg 1887)" . . "Chordata" . "Piaractus mesopotamicus" . .