n = 6
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Thoracocharax brevis | Eigenmann, 1912 | Gasteropelecus maculatus | Gasteropelecidae | Spotted hatchetfish |
| Thoracocharax maculatus | (Steindachner, 1879) | Gasteropelecus maculatus | Gasteropelecidae | Spotted hatchetfish |
| Thoracocharax maculatus magdalenae | Eigenmann, 1912 | Gasteropelecus maculatus | Gasteropelecidae | Spotted hatchetfish |
| Thoracocharax magdalenae | Eigenmann, 1912 | Gasteropelecus maculatus | Gasteropelecidae | Spotted hatchetfish |
| Thoracocharax securis | (De Filippi, 1853) | Thoracocharax securis | Gasteropelecidae | Giant hatchetfish |
| Thoracocharax stellatus | (Kner, 1858) | Thoracocharax stellatus | Gasteropelecidae | Spotfin hatchetfish |