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| Order | Family | English Common Name | Spanish Common Name | Portuguese Common Name | Scientific Name | Belonging | Conservation status | Notes | ||
| 1 | Characiformes | Characidae | Astyanax rutilus | Not listed | ||||||
| 2 | Cyprinodontiformes | Poeciliidae | Ten Spotted Live Bearer | Madrecita Diez Manchas | Cnesterodon decemmaculatus | Native | ||||
| 3 | Madrecita | Barrigudinho | Phalloceros caudimaculatus | Native | ||||||
| 4 | Siluriformes | Heptapteridae | Catfish | Bagre Negro | Rhamdia quelen | Native | ||||
| 5 | Loricariidae | Vieja del Agua | Hypostomus commersoni | Native | ||||||
| 6 | Pimelodidae | Porteñito | Parapimelodus valenciennis | Native | ||||||
| 7 | Bagre Manchado | Pimelodus maculatus | Native | |||||||
| 8 | Passeriformes | Furnariidae | Rufous Hornero | Hornero | João-de-barro | Furnarius rufus | Native |
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| 9 | Thraupidae | Yellow-billed Cardinal | Cardenilla | Cavalaria | Paroaria capitata | Native |
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