There are 100 species of Bryozoa (moss animals) recorded in Ireland.^[1][2][3][4]

Class Gymnolaemata

Order Cheilostomata

Family Adeonidae

• Reptadeonella violacea

Family Aeteidae

• Aetea anguina
• Aetea truncata

Family Bitectiporidae

• Pentapora fascialis
• Schizomavella linearis
• Schizomavella sarniensis

Family Bryocryptellidae

• Palmiskenea skenei
• Porella compressa

Family Bugulidae

• Bicellariella ciliata
• Bugula angustiloba
• Bugula avicularia
• Bugula calathus
• Bugula fulva
• Bugula neritina
• Bugula plumosa
• Bugula purpurotincta
• Bugula stolonifera
• Bugula turbinata

Family Candidae

• Caberea boryi
• Caberea ellisii
• Scrupocellaria reptans
• Scrupocellaria scrupea
• Scrupocellaria scruposa

Family Calloporidae

• Callopora lineata
• Callopora rylandi
• Cauloramphus spiniferum

Family Cellariidae

• Cellaria fistulosa
• Cellaria salicornioides
• Cellaria sinuosa

Family Celleporidae

• Buskea dichotoma
• Buskea quincuncialis
• Cellepora pumicosa
• Celleporina caliciformis
• Omalosecosa ramulosa
• Turbicellepora avicularis

Family Cribrilinidae

• Cribrilina cryptooecium

Family Cryptosulidae

• Cryptosula pallasiana

Family Diastoporidae

• Diplosolen obelia

Family Electridae

• Electra pilosa

Family Escharellidae

various species

Family Escharinidae

• Phaeostachys spinifera

Family Eucrateidae

• Eucratea loricata

Family Exochellidae

• Escharoides coccinea

Family Flustridae

• Carbasea carbasea
• Chartella papyracea
• Flustra foliacea
• Securiflustra securifrons

Family Haplopomidae

• Haplopoma impressum

Family Hippothoidae

• Celleporella hyalina

Family Membraniporidae

• Conopeum reticulum
• Conopeum seurati
• Membranipora membranacea

Family Microporellidae

• Fenestrulina malusii

Family Phidoloporidae

• Reteporella beaniana
• Reteporella grimaldii

Family Schizoporellidae

• Schizoporella unicornis

Family Scrupariidae

• Scruparia chelata

Family Smittinidae

• Parasmittina trispinosa
• Smittina affinis
• Smittoidea reticulata

Family Umbonulidae

• Oshurkovia littoralis

Order Ctenostomatida

Family Alcyonidiidae

• Alcyonidioides mytili
• Alcyonidium diaphanum
• Alcyonidium gelatinosum
• Alcyonidium hirsutum
• Alcyonidium parasiticum

Family Flustrellidridae

• Flustrellidra hispida

Family Vesiculariidae

• Amathia lendigera
• Bowerbankia imbricata
• Bowerbankia pustulosa
• Vesicularia spinosa

Class Stenolaemata

Order Cyclostomatida

Family Crisiidae

• Crisia aculeata
• Crisia denticulata
• Crisia eburnea
• Crisidia cornuta
• Filicrisia geniculata

Family Lichenoporidae

• Disporella hispida

Family Plagioeciidae

• Plagioecia patina

Family Tubuliporidae

• Tubulipora liliacea
• Tubulipora plumosa