| record potential | water |
| Yellowfin River Pellona
Sea Trout Aymara Dorado Curimbata Jau Barred Sorubim Spotted Sorubim |
whole country Rio Grande whole country Rio Parana Rio Parana Parana River system Rio Parana Rio Parana |
| record potential | water |
| Creole Perch South American Lungfish South Am. Freshwater Stingray Porcupine River Stingray Pejerrey - Pati |
Rio Parana Parana River system whole country - whole country whole country Parana River system Parana River system |
| record potential | water |
| Granulated Catfish Acoupa Weakfish Chameleon Cichlid |
whole country whole country whole country |
| background |
| continent country capital population sq km |
America
(South America) Argentina Buenos Aires 37.812.817 2.766,890 |