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.
Fissurellidae (keyhole limpets and slit limpets)
Trochidae (top snails)
Littorinidae (periwinkles)