n = 16
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Synaptula bandae | Heding, 1928 | Synaptula bandae | Synaptidae | |
| Synaptula denticulata | Heding, 1928 | Synaptula denticulata | Synaptidae | |
| Synaptula hydriformis | (Lesueur, 1824) | Synaptula hydriformis | Synaptidae | |
| Synaptula indivisa | (Semper, 1867) | Synaptula indivisa | Synaptidae | |
| Synaptula lactea | (Sluiter, 1888) | Synaptula lactea | Synaptidae | |
| Synaptula lamperti | Heding, 1928 | Synaptula lamperti | Synaptidae | Lampert's sea cucumber |
| Synaptula madreporica | Heding, 1928 | Synaptula madreporica | Synaptidae | |
| Synaptula media | Cherbonnier & Féral, 1984 | Synaptula media | Synaptidae | |
| Synaptula psara | Sluiter, 1888 | Synaptula psara | Synaptidae | |
| Synaptula reciprocans | (Forskal, 1775) | Synaptula reciprocans | Synaptidae | |
| Synaptula recta | (Semper, 1868) | Synaptula recta | Synaptidae | |
| Synaptula reticulata | (Semper, 1868) | Synaptula reticulata | Synaptidae | |
| Synaptula secreta | Lopez, 1957 | Synaptula secreta | Synaptidae | |
| Synaptula spinifera | Massin & Tomascik, 1996 | Synaptula spinifera | Synaptidae | |
| Synaptula striata | Sluiter, 1888 | Synaptula striata | Synaptidae | |
| Synaptula virgata | (Sluiter, 1901) | Synaptula virgata | Synaptidae |