n = 7
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Idiacanthus antrostomus | Gilbert, 1890 | Idiacanthus antrostomus | Stomiidae | Pacific blackdragon |
| Idiacanthus atlanticus | Brauer, 1906 | Idiacanthus atlanticus | Stomiidae | Black dragonfish |
| Idiacanthus aurora | Waite, 1916 | Idiacanthus atlanticus | Stomiidae | Black dragonfish |
| Idiacanthus fasciola | Peters, 1877 | Idiacanthus fasciola | Stomiidae | Ribbon sawtail fish |
| Idiacanthus ferox | (Günther, 1878) | Idiacanthus fasciola | Stomiidae | Ribbon sawtail fish |
| Idiacanthus niger | Regan, 1914 | Idiacanthus atlanticus | Stomiidae | Black dragonfish |
| Idiacanthus retrodorsalis | Thompson, 1916 | Idiacanthus atlanticus | Stomiidae | Black dragonfish |