Nassariidae

Nassariidae Temporal range: Lower Cretaceous–Recent PreꞒ Ꞓ O S D C P T J K Pg N
A live individual of Nassarius fossatus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Buccinoidea
Family:	Nassariidae Iredale, 1916 (1835)
Type genus
Nassarius Dumenil, 1805
Species
See text
Synonyms[1]
Nassidae Swainson, 1835

The Nassariidae, Nassa mud snails (US), or dog whelks (UK) are a taxonomic family of small to medium-sized sea snails, marine gastropod mollusks in the clade Neogastropoda.

"Dog whelk" also refers to Nucella lapillus.