| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Alcyonidium albidum Alder, 1857 |
Northeast Atlantic and the Mediterranean Sea | ||
| Alcyonidium australe d'Hondt & Moyano, 1979 |
Southwest Atlantic and Southeast Pacific | ||
| Alcyonidium diaphanum Lamouroux, 1813 |
Sea chervil | Northeast Atlantic, Mediterranean Sea and the Arctic | |
| Alcyonidium disciforme Smitt, 1872 |
Northeast Pacific and the Arctic | ||
| Alcyonidium gelatinosum (Linnaeus, 1767) |
Northern Atlantic, Arctic and the Mediterranean Sea | ||
| Alcyonidium hirsutum (Flemming, 1828) |
Sponge moss worm | Northwest Pacific and Northern Atlantic | |
| Alcyonidium kermadecense Gordon, 1984 |
Southwest Pacific | ||
| Alcyonidium mamillatum Alder, 1857 |
Arctic, Northeast Atlantic and the Mediterranean | ||
| Alcyonidium parasiticum (Fleming, 1828) |
Northeast Atlantic | ||
| Alcyonidium pedunculatum unspecified |
Smooth leather bryozoan | Northeast Pacific and the Arctic | |
| Alcyonidium polyoum (Hassall, 1841) |
Atlantic Ocean | ||
| Alcyonidium radicellatum Kluge, 1946 |
Northeast Atlantic and the Arctic | ||
| Alcyonidium variegatum Prouho, 1892 |
Mediterranean Sea | ||
| Alcyonidium vermiculare Okada, 1925 |
Northeast Pacific and the Arctic |