Acontiaria Stephenson, 1935 (original description)
Actinia equina (Linnaeus, 1758) (additional source)
Calliactis parasitica (Couch, 1842) (additional source)
Cereus pedunculatus (Pennant, 1777) (additional source)
Diadumene cincta Stephenson, 1925 (additional source)
Hormathia digitata (O.F. Müller, 1776) (additional source)
Metridium senile (Linnaeus, 1761) (additional source)
Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia troglodytes (Price in Johnston, 1847) accepted as Cylista troglodytes (Price in Johnston, 1847) (additional source)
Stomphia coccinea (Müller, 1776) (additional source)

Irish Exclusive economic Zone for Sagartia elegans (Dalyell, 1848) 
Italy for Diadumene lineata (Verrill, 1869)  (origin: alien)
Suez canal for Diadumene lineata (Verrill, 1869)  (origin: alien)
Swedish Exclusive Economic Zone for Hormathia digitata (O.F. Müller, 1776) 
United Kingdom for Diadumene lineata (Verrill, 1869)  (origin: alien)
United Kingdom Exclusive Economic Zone for Actinia equina (Linnaeus, 1758) 
United Kingdom Exclusive Economic Zone for Calliactis parasitica (Couch, 1842) 
United Kingdom Exclusive Economic Zone for Cereus pedunculatus (Pennant, 1777) 
United Kingdom Exclusive Economic Zone for Diadumene cincta Stephenson, 1925 
United Kingdom Exclusive Economic Zone for Metridium senile (Linnaeus, 1761) 
United Kingdom Exclusive Economic Zone for Sagartia troglodytes (Price in Johnston, 1847) 
United Kingdom Exclusive Economic Zone for Stomphia coccinea (Müller, 1776)