| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Opercularella belgicae (Hartlaub, 1904) |
Belgica's hydroid | Southwest Atlantic, Southeast Pacific and the Antarctic | |
| Opercularella humilis (Bale, 1924) |
Southwest Pacific | ||
| Opercularella lacerata (Johnson, 1847) |
Arctic, Atlantic, Pacific Oceans and the Mediterranean | ||
| Opercularella rugosa (Nutting, 1901) |
Eastern Pacific |