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| Order | Family | English Common Name | Spanish Common Name | Portuguese Common Name | Scientific Name | Belonging | Conservation status | Notes | ||
| 1 | Perciformes | Cichlidae | Oscar | Astronotus crassipinnis | Not listed | |||||
| 2 | Pleuronectiformes | Achiridae | American Sole | Lenguado de Río | Catathyridium jenynsii | Native | ||||
| 3 | Squamata | Colubridae | Golden Liophis | Culebra Acuática | Cobra Preta de Banhado | Erythrolamprus semiaureus | Native | |||
| 4 | Ñacanina de Bañado | Hydrodynastes gigas | Native | |||||||
| 5 | Culebra de Olfers | Philodryas olfersii | Native | |||||||
| 6 | Patagonian Green Racer | Culebra del Pastizal | Philodryas patagoniensis | Native | ||||||
| 7 | Ringed Hognose Snake | Falsa Yarará Ñata | Nariguda | Xenodon dorbignyi | Native | |||||
| 8 | Toad-Eating Snake | Falsa Yarará | Xenodon merremii | Native | ||||||
| 9 | Viperidae | Yarará Chica | Bothrops diporus | Native | ||||||
| 10 | Pilosa | Myrmecophagidae | Giant Anteater | Oso Hormiguero Gigante | Myrmecophaga tridactyla | Native |
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