| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Idiotropiscis australis (Waite & Hale, 1921) |
Southern little pipehorse | Eastern Indian Ocean | 5.5 |
| Idiotropiscis larsonae (Dawson, 1984) |
Helen's pygmy pipehorse | Eastern Indian Ocean | |
| Idiotropiscis lumnitzeri Kuiter, 2004 |
Sydney's pygmy pipehorse | Southwestern Pacific | 5.52 |