The Common Whelk is the largest Irish Whelk, and is found round the entire coastline. It is rarely seen above the low-tide mark, but is commonly taken in pots by Prawn and Crab fishermen. It has no commercial value in Ireland .

The Common Whelk belongs to the mollusc family, which includes Snails and Octopus. It is a carnivorous predator, preying on tube-worms, cockles and other bi-valves. It will also attack resting or dozing fish by insidiously climbing onto them and attempting to pin them to the ground! This is rarely a successful tactic, however, and the Whelk’s largest meals generally come from scavenging on the carcasses of dead or dying marine animals.

The Whelk travels along the sea-bed in much the same fashion as the land Snail, using its large muscular foot to slide across rocks and sand. If attacked it can retreat into its tough shell, and is rarely targeted as prey except by large, hungry Crabs and Lobsters.