| Family | Genus | Species |
|---|---|---|
| Anguillidae | 1 | 22 |
| Chlopsidae | 6 | 22 |
| Colocongridae | 1 | 5 |
| Congridae | 21 | 301 |
| Cyematidae | 2 | 3 |
| Derichthyidae | 2 | 3 |
| Eurypharyngidae | 1 | 2 |
| Heterenchelyidae | 1 | 3 |
| Monognathidae | 1 | 2 |
| Moringuidae | 2 | 23 |
| Muraenesocidae | 6 | 13 |
| Muraenidae | 15 | 198 |
| Myrocongridae | 1 | 1 |
| Nemichthyidae | 3 | 9 |
| Nettastomatidae | 7 | 52 |
| Ophichthidae | 29 | 210 |
| Protanguillidae | 1 | 1 |
| Saccopharyngidae | 1 | 4 |
| Serrivomeridae | 2 | 15 |
| Synaphobranchidae | 9 | 41 |