A rather beautiful but deadly predator, the Large Necklace Shell, Euspira catena, prowls the sand - usually just below the surface - searching for other shellfish. Once it finds one, it captures it with its muscular foot, drills its way through the shell and then sucks out the flesh. It gets its name from the shape of its egg mass which you see in the illustration. About 8cms long and 5cms high, the Necklace Shell is common all around our coasts.
North Sea. St. Abbs Marine Reserve