n = 9
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Mesonauta acora | (Castelnau, 1855) | Mesonauta acora | Cichlidae | |
| Mesonauta egregius | Kullander & Silfvergrip, 1991 | Mesonauta egregius | Cichlidae | |
| Mesonauta festiva | (Heckel, 1840) | Mesonauta festivus | Cichlidae | Flag cichlid |
| Mesonauta festivum | (Heckel, 1840) | Mesonauta festivus | Cichlidae | Flag cichlid |
| Mesonauta festivus | (Heckel, 1840) | Mesonauta festivus | Cichlidae | Flag cichlid |
| Mesonauta guyanae | Schindler, 1998 | Mesonauta guyanae | Cichlidae | |
| Mesonauta insignis | (Heckel, 1840) | Mesonauta insignis | Cichlidae | |
| Mesonauta mirificus | Kullander & Silfvergrip, 1991 | Mesonauta mirificus | Cichlidae | |
| Mesonauta surinamensis | Sauvage, 1882 | Polycentrus schomburgkii | Polycentridae | Guyana leaffish |