• Alcyonidioides mytili (Dalyell, 1848)
• Alcyonidium albidum Alder, 1857
• Alcyonidium candidum Ryland, 1963
• Alcyonidium cellarioides Calvet, 1900
• Alcyonidium condylocinereum Porter, 2004
• Alcyonidium diaphanum (Hudson, 1778)
• Alcyonidium disciforme Smitt, 1872
• Alcyonidium duplex Prouho, 1892
• Alcyonidium gelatinosum (Linnaeus, 1761)
• Alcyonidium hirsutum (Fleming, 1828)
• Alcyonidium hydrocoalitum Porter, 2004
• Alcyonidium mamillatum Alder, 1857
• Alcyonidium mytili Dalyell, 1848 accepted as Alcyonidioides mytili (Dalyell, 1848)
• Alcyonidium parasiticum (Fleming, 1828)
• Alcyonidium polyoum (Hassall, 1841)
• Alcyonidium reticulum Ryland & Porter, 2000 accepted as Alcyonidium gelatinosum (Linnaeus, 1761)
• Alcyonidium variegatum Prouho, 1892
• Alcyonidium verrilli Osburn, 1912
• Alcyonidium vicarians d'Hondt & Chimenz Gusso, 2006
• Ascorhiza mawatarii d'Hondt, 1983
• Clavopora hystricis Busk, 1874
• Lobiancopora hyalina Pergens, 1889
• Metalcyonidium gautieri d'Hondt, 1976
• Monobryozoon ambulans Remane, 1936
• Pachyzoon atlanticum d'Hondt, 1983
• Pherusella tubulosa (Ellis & Solander, 1786)
• Pseudalcyonidium bobinae d'Hondt, 1976