The Common Whelk (Buccinum Undatum) is a large, predatory sea snail found in cold waters of the North Atlantic. Recognisable by its spiral-shaped shell, which can grow up to 10 cm long, this mollusk inhabits sandy or muddy seabeds from shallow coastal waters to depths of 1,200 meters.

The whelk is an opportunistic feeder, preying on bivalves, worms, and dead marine animals. It plays an important role in marine ecosystems and is also a significant species in commercial fisheries, particularly in Europe, where it is harvested for its meat.

Collected in Sheringham, Norfolk in 1916.