David Fleetham / Tiny eyes of Spider conch / Scorpion shell (Lambis scorpius) peering from underside of shell, Philippines.

Michele Westmorland / Conch (Strombidae) shell on tropical beach with stormy clouds in distance, Provodenciales, Turks and Caicos, Caribbean. June 2007

Juergen Freund / X-ray of shell of spider conch {Lambis chiragra}

Gerry Ellis / Conch shell on Seven Mile Beach, Grand Turk Island, Turk and Caicos Islands, Caribbean

LYNN M. STONE / Queen conch shell on Florida beach, USA

Michael Pitts / Horse conch on sea bed, Florida, USA

Pascal Kobeh / Scorpion shell / Scorpion spider conch (Lambis scorpius) New Caledonia, Pacific Ocean.

Shane Gross / Caribbean hermit crab (Coenobita clypeatus) using an empty conch shell for protection and housing. Eleuthera, Bahamas.

David Fleetham / Spider conch (Lambis lambis) Yap, Federated States of Micronesia.

Staffan Widstrand / Seashells collected from beach, Triton Bay, Mainland New Guinea, Western Papua, Indonesian New Guinea

Pete Oxford / Queen conch (Strombus gigas) seashells harvested for their meat, Hat Caye, Lighthouse Reef Atoll, Belize.

Ingo Arndt / Shin Bone Tibia Shell (Tibia fusus), Meeresmuseum Ozeania, Riedenburg, Germany