Man holding an open oyster, Jutland, Denmark, Scandinavia, Europe

Oysters on half shells, California, United States of America, North America

Caribbean land hermit crab (Coenobita clypeatus), Half Moon Caye, UNESCO, Mesoamerican Barrier Reef, Belize

Caribbean land hermit crab (Coenobita clypeatus), Half Moon Caye, UNESCO, Mesoamerican Barrier Reef, Belize

Ready to eat seafood platter at Le Petit Zinc Restaurant near Boulevard Saint Germain, Left Bank, Paris, France

Chambered nautilus shell split in half, Rongelap, Marshall Islands, Micronesia, Pacific

Viagra in a shell - fresh oysters for sale at fish market on Fisherman's Wharf, Monterey, California.

Appetizing fresh oysters with lemon on the deep dish on ice. Cheese with spices and tasty bread. Served with knives, fork, spoon and plate. White background. Copy space

Appetizing fresh oysters with lemon on the deep dish on ice. Cheese with spices and tasty bread. Served with knives, fork, spoon and plate. White background. Copy space

Pearl nautilus shell half showing chambers and spiral (Sepia photograph).

PACIFIC ISLANDS Tuamotu Islands Manihi. Open half of oyster shell with four black pearls.