The Pacific geoduck is a species of very large saltwater clam in the family Hiatellidae. The common name is derived from the Lushootseed name, gʷidəq.
Geoduck
Geoduck growth increments
Geoduck for sale at Tsukiji fish market in Tokyo
Seafood geoduck display in a Chinese restaurant in Hong Kong
Clam is a common name for several kinds of bivalve molluscs. The word is often applied only to those that are edible and live as infauna, spending most of their lives halfway buried in the sand of the seafloor or riverbeds. Clams have two shells of equal size connected by two adductor muscles and have a powerful burrowing foot. They live in both freshwater and marine environments; in salt water they prefer to burrow down into the mud and the turbidity of the water required varies with species and location; the greatest diversity of these is in North America.
A clam shell (species Spisula solidissima) at Sandy Hook, New Jersey
Littleneck clams, small hard clams, species Mercenaria mercenaria
A clam dish
Clams simmering in a white wine sauce