Nick Upton / European oyster drill / Sting winkle (Ocenebra erinacea) a pest of oyster beds, on rocks low on the shore alongside Acorn barnacles (Balanus perforatus) exposed at low tide, with seaweed, rock pools a...

Nick Upton / Dog whelks (Nucella lapillus) and clusters of their eggs attached to a rock exposed at low tide, Rhossili, The Gower peninsula, Wales, UK, June.

Nick Upton / Dog whelk (Nucella lapillus), a predator of barnacles, on rocks encrusted with Common barnacles / Northern rock barnacles (Semibalanus balanoides) exposed at low tide, with seaweed, a rock pool and th...

Ingo Arndt / Ramose Murex (Chicoreus ramosus), Meeresmuseum Ozeania, Riedenburg, Germany, sequence 2 of 2

Ingo Arndt / Venus Comb Murex (Murex pecten), Meeresmuseum Ozeania, Riedenburg, Germany

Ingo Arndt / Murex Snail (Chicoreus spectrum) from Brazil, Meeresmuseum Ozeania, Riedenburg, Germany

Ingo Arndt / Venus Comb Murex (Murex pecten), Meeresmuseum Ozeania, Riedenburg, Germany

Nick Upton / Honeycomb worm reef (Sabellaria alveolata) with Common barnacles (Semibalanus balanoides) and Dog whelks (Nucella lapillus), St.Bees, Cumbria, UK, July

Nick Upton / Dog whelk (Nucella lapillus) eggs in a rock crevice, exposed at low tide, North Berwick, East Lothian, UK, July

Nick Upton / Dog whelks (Nucella lapillus) dense cluster on rocks encrusted with Common barnacles (Semibalanus balanoides) exposed at low tide, some with barnacles growing on their shells, with sand flats and the...

MYN / Jerry Monkman / Common periwinkles (Littorina littorea) (left and top) and Dogwhelk (Nucella lapillus). Rye, New Hampshire, USA, August. meetyourneighbours.net project

Juan Carlos Munoz / Catch of murex sea snails (Muricidae), Puerto de Chipiona, Costa de la Luz, Cadiz, Andalucia, Spain, March 2008