The True Whelk (Buccinum undatum) is a variable species of sea snail, exhibiting differences in colour and shell features. Typically, it has a robust, ovate to spindle-shaped shell that can grow up to 100 mm in length. The shell usually has 5–7 rounded whorls, giving it a somewhat turreted appearance, with a pointed apex at the top. It is covered by a pale yellow, slightly hairy outer layer called a ‘periostracum’, which may wear off over time. The shell is predominantly cream to pale brown, sometimes with darker bands or blotches, and features spiral ridges and growth lines, contributing to its textured surface.

Location:
Sandy or muddy seabeds from the intertidal zone to depths of about 250 metres, throughout the North Atlantic, including the North Sea, British Isles, and parts of the Mediterranean Sea.

Average Size:
Up to 100 mm in length.

Family:
Buccinidae (True Whelks)

Species:
Buccinum undatum

Ecological Role:
A predator and scavenger, feeding primarily on bivalves, marine worms, carrion, and other small benthic invertebrates.