List of marine molluscs of Ireland

The list of marine molluscs of Ireland is a list of marine species that form a part of the molluscan fauna of Ireland.

Their habitats include littoral, mesopelagic, pelagic, oceanic zone, benthic, deep ocean water and deep sea.

Subclass Solenogastres
There were recorded at least 2 species of solenogastres in Ireland.

Family Rhopalomeniidae
 * Rhopalomenia aglaopheniae (Kowalewsky & Marion, 1887)

Family Neomeniidae
 * Neomenia carinata Tullberg, 1875

Subclass Caudofoveata
There was recorded at least 1 species of Caudofoveata in Ireland.

Family Chaetodermatidae
 * Chaetoderma nitidulum Lovén, 1844

Class Polyplacophora (sea cradles, loricates)
There were recorded at least 13 species of polyplacophorans in Ireland.

Family Acanthochitonidae
 * Acanthochitona crinita (Pennant, 1777)
 * Acanthochitona discrepans (Brown, 1827)
 * Acanthochitona fascicularis (Linnaeus, 1767)

Family Ischnochitonidae
 * Lepidochitona cinerea (Linnaeus, 1767)
 * Tonicella marmorea (Fabricius, 1780)
 * Tonicella rubra (Linnaeus, 1767)

Family Leptochitonidae
 * Callochiton achatinus (Brown, 1827)
 * Callochiton septemvalvis (Montagu, 1803)
 * Hanleya hanleyi (Bean in Thorpe, 1844)
 * Lepidopleurus asellus (Gmelin, 1791)
 * Lepidopleurus cancellatus (Sowerby, 1839)
 * Leptochiton asellus (Gmelin, 1791)
 * Leptochiton cancellatus (G. B. Sowerby II, 1840)

Class Scaphopoda (tusk shells, tooth shells)
There were recorded at least 2 species of tusk shells in Ireland.

Family Dentaliidae
 * Antalis entalis (Linnaeus, 1758)
 * Antalis vulgaris (da Costa, 1778)

Class Cephalopoda (inkfish)
There were recorded at least 5 species of cephalopods in Ireland.

Family Octopodidae (most octopuses)
 * Eledone cirrhosa (Lamarck, 1798)
 * Octopus vulgaris Cuvier, 1797

Family Sepiolidae
 * Rossia macrosoma (Delle Chiaje, 1829)
 * Sepiola atlantica d'Orbigny, 1839

Family Architeuthidae (giant squid)
 * Architeuthis dux Steenstrup, 1857