n = 4
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Arapaima agassizii | (Valenciennes, 1847) | Arapaima agassizii | Arapaimidae | |
| Arapaima gigas | (Schinz, 1822) | Arapaima gigas | Arapaimidae | Arapaima |
| Arapaima leptosoma | Stewart, 2013 | Arapaima leptosoma | Arapaimidae | |
| Arapaima mapae | (Valenciennes, 1847) | Arapaima mapae | Arapaimidae |