This is a list of the marine molluscs of the country of New Zealand, which are a part of the molluscan fauna of New Zealand, which is a part of the biodiversity of New Zealand. Marine molluscs include marine gastropods (sea snails and sea slugs), bivalves (such as pipis, cockles, oysters, mussels, scallops), octopuses, squid and other classes of Mollusca. This list does not include the land and freshwater species.

Aplacophora

Polyplacophora

Acanthochitonidae Mopaliidae Callochitonidae Chitonidae Callochitonidae Ischnochitonidae Leptochitonidae Loricidae

Gastropoda

Nacellidae Fissurellidae (keyhole limpets and slit limpets) Haliotidae Calliostomatidae Trochidae (top snails) Turbinidae Neritidae Batillariidae Turritellidae Littorinidae (periwinkles) Rissoidae Struthiolariidae Ranellidae Hipponicidae (hoof snails) Buccinidae (whelks) Muricidae Volutidae Olividae Epitoniidae (wentletraps) Janthinidae Okadaiidae Facelinidae Bullidae Siphonariidae Amphibolidae Onchidiidae

Bivalvia

Mesodesmatidae Tellinidae Veneridae Ostreidae Pectinidae Mytilidae Pinnidae

Scaphopoda

Gadilidae Dentaliidae

Cephalopoda

Spirulidae Sepiadariidae Sepiolidae Cranchiidae Histioteuthidae Octopodidae Argonautidae