The Nassariidae, Nassa mud snails (USA), 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.

Nassariidae. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Nassariidae.

Nassarius fossatus, the channeled basket snail, is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the nassa mud snails or dog whelks. It is native to the west coast of North America where it is found on mudflats on the foreshore and on sand and mud in shallow water.

Nassarius fossatus. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Nassarius_fossatus.