Sue Daly / Netted dogwhelk (Nassarius reticulatus) moving across the seabed, Sark, British Channel Islands, UK, July.

Nick Upton / Aggregation of Netted dog whelks (Nassarius reticulatus) scavenging on rocks just below the low water tideline, Rhossili, The Gower Peninsula, UK, June.

Nick Upton / Seven Netted dog whelk (Nassarius retuculata) egg cases attached to a rock exposed at low tide, Lyme Regis, Dorset, UK, May

Nick Upton / Netted dog whelk (Nassarius reticulatus) on the move in a rock pool, The Gower, Wales, UK, August.

Philippe Clement / Egg cases / eggs of netted dog whelk (Tritia reticulata / Nassarius reticulatus) attached to Razor shells, ashed ashore on beach, Hauts-de-France, France, July

Nick Upton / Netted dog whelk (Nassarius reticulatus) on the move to join others scavenging on a dead crab in a rock pool with its long siphon raised, Rhossili, The Gower, Wales, UK, September.