n = 7
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Ilyophis arx | Robins, 1976 | Ilyophis arx | Synaphobranchidae | |
| Ilyophis blachei | Saldanha & Merrett, 1982 | Ilyophis blachei | Synaphobranchidae | |
| Ilyophis brunneus | Gilbert, 1891 | Ilyophis brunneus | Synaphobranchidae | Muddy arrowtooth eel |
| Ilyophis capensis | (Barnard, 1923) | Diastobranchus capensis | Synaphobranchidae | Basketwork eel |
| Ilyophis nigeli | Shcherbachev & Sulak, 1997 | Ilyophis nigeli | Synaphobranchidae | |
| Ilyophis robinsae | Sulak & Shcherbachev, 1997 | Ilyophis robinsae | Synaphobranchidae | |
| Ilyophis saldanhai | Karmovskaya & Parin, 1999 | Ilyophis saldanhai | Synaphobranchidae |