| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Opalia abbotti Clench & Turner, 1952 |
Atlantic Ocean and the Mediterranean Sea | 0.45 | |
| Opalia acus unspecified |
Eastern Atlantic | 1.3 | |
| Opalia aurifila (Dall, 1889) |
Western Atlantic | 1.1 | |
| Opalia australis (Lamarck, 1822) |
Eastern Indian Ocean | ||
| Opalia bicarinata (Sowerby, 1844) |
Western Central Pacific | ||
| Opalia borealis Keep, 1881 |
Boreal wentletrap | Northern Pacific | 33 |
| Opalia burchorum DuShane, 1988 |
Eastern Central Pacific | ||
| Opalia burryi Clench & Turner, 1950 |
Western Atlantic | 1.52 | |
| Opalia crenata (Linnaeus, 1758) |
Coarse wentletrap | Western Atlantic and Mediterranean Sea | 2.2 |
| Opalia eolis Clench & Turner, 1950 |
Cancellate wentletrap | Western Central Atlantic | 1.3 |
| Opalia funiculata (Carpenter, 1857) |
Scalloped wentletrap | Eastern Pacific | |
| Opalia garciai Kilburn, 1994 |
Western Central Pacific | ||
| Opalia hellenica (Forbes, 1844) |
Mediterranean Sea | ||
| Opalia hotessieriana (d'Orbigny, 1842) |
Pitted wentletrap | Western Atlantic | 1.3 |
| Opalia infrequens (Adams, 1852) |
Sparse wentletrap | East Pacific | |
| Opalia leeana (Verrill, 1882) |
Northwest Atlantic | 0.5 | |
| Opalia longissima Garcia, 2004 |
Western Central Pacific | ||
| Opalia megalodon Garcia, 2004 |
Western Central Pacific | ||
| Opalia montereyensis (Dall, 1907) |
Monterey wentletrap | East Pacific | |
| Opalia morchiana (Dall, 1889) |
Western Atlantic | 1.2 | |
| Opalia neocaledonica Garcia, 2004 |
Western Central Pacific | ||
| Opalia pumilio (Morch, 1874) |
Dwarf wentletrap | Western Atlantic | 1.5 |
| Opalia sumatrensis (Thiele, 1925) |
Eastern Central Pacific | ||
| Opalia thorsenae Garcia, 2004 |
Western Central Pacific | ||
| Opalia tortilis (Watson, 1883) |
Western Atlantic | 1.07 | |
| Opalia velumnuptialis Garcia, 2004 |
Western Central Pacific | ||
| Opalia wareni Garcia, 2004 |
Western Central Pacific | ||
| Opalia watsoni (De Boury, 1911) |
Western Atlantic |