| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Balanoglossus apertus (Spengel, 1893) |
Southwest Atlantic | ||
| Balanoglossus aurantiacus (Girard, 1853) |
Golden acorn worm | Western Atlantic | 100 |
| Balanoglossus australiensis (Hill, 1894) |
Western Pacific and the Mediterranean | ||
| Balanoglossus borealis (Willey, 1899) |
Northwest Pacific | ||
| Balanoglossus capensis (Gilchrist, 1908) |
Southern Africa | ||
| Balanoglossus carnosus Müller, 1893 |
Indo-West Pacific | ||
| Balanoglossus clavigerus delle Chiaje, 1829 |
Northeast Atlantic and the Mediterranean | ||
| Balanoglossus gigas Müller, 1893 |
Indo-pacific and Southwest Atlantic | 150 | |
| Balanoglossus hydrocephalus Kuwano, 1902 |
Indian Ocean | ||
| Balanoglossus misakiensis Kuwano, 1902 |
Northwest Pacific | ||
| Balanoglossus natalensis (Gilchrist, 1908) |
South Africa | ||
| Balanoglossus occidentalis Ritter, 1902 |
Eastern Central Pacific | ||
| Balanoglossus proterogonius Belichov, 1928 |
Northeast Pacific | ||
| Balanoglossus salmoneus Belichov, 1928 |
Northeast Pacific | ||
| Balanoglossus stephensoni van der Horst, 1937 |
South Africa | ||
| Balanoglossus studiosorum van der Horst |
Western Central Pacific |