Sandra Bartocha / Sea shells in sand, North sea, Germany, September

Philippe Clement / Common / Edible cockle (Cerastoderma / Cardium edule) shells on beach, Belgium

Juergen Freund / Jewelmer Pearlfarm, Goldlip pearl oyster (Pinctada maxima) with golden pearl on beach, Palawan, Philippines, May 2009

Billy Black / Starfish in half Oyster (Lophia folium) shell lying on bed of seaweed. Pumpkin Island, Maine, USA.

Lynn M Stone / Mixed sea shells on beach, Sarasata, Florida, USA

Ernie Janes / Fisherman returning with bucket of Winkles and bicycle, Blakeney Harbour, Norfolk, UK, September

Edwin Giesbers / Land hermit crab (Coenobita rugosus) in spiral seashell on beach, Bako National Park, Sarawak, Borneo, Malaysia

Carine Schrurs / Octopus {Octopus aegina} using seashell for cover. Batangas, Philippines

Constantinos Petrinos / Moon snail {Naticarius orientalis} Sulawesi Indonesia

Constantinos Petrinos / Bubble shell {Hydatina physis} Sulawesi Indonesia

Kevin Schafer / Seashell collection showing diversity of shapes and sizes

Carine Schrurs / Octopus {Octopus aegina} using tin can for cover. Anilao Batangas Philippines ocellate

Carine Schrurs / Octopus {Octopus aegina} using seashell for cover. Anilao Batangas Philippines ocellate