| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Polyorchis haplus Skogsberg, 1948 |
Eastern Pacific | 2 | |
| Polyorchis karafutoensis Kishinouye, 1910 |
Northwest Pacific | 5 | |
| Polyorchis montereyensis Skogsberg, 1948 |
Eastern Central Pacific | 4 | |
| Polyorchis penicillatus (Eschscholtz, 1829) |
Penicillate jellyfish | Eastern Pacific and the Arctic | 10 |