| Family | Genus | Species |
|---|---|---|
| Anablepidae | 3 | 22 |
| Aphaniidae | 6 | 98 |
| Aplocheilidae | 2 | 26 |
| Cyprinodontidae | 8 | 195 |
| Fluviphylacidae | 1 | 8 |
| Fundulidae | 4 | 59 |
| Goodeidae | 18 | 55 |
| Nothobranchiidae | 16 | 378 |
| Pantanodontidae | 2 | 2 |
| Poeciliidae | 28 | 361 |
| Procatopodidae | 13 | 53 |
| Profundulidae | 2 | 21 |
| Rivulidae | 46 | 500 |
| Valenciidae | 1 | 3 |