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clam: Media

mollusk

Images

(Left) Quahog (Mercenaria); (right) soft-shell clam (Mya)
Russ Kinne/Photo Researchers
Clams near Rose Atoll
Giant clams (Tridacna gigas) in the waters off Rose Atoll.
Jean Kenyon—Coral Reef Ecosystem Division/Pacific Islands Fisheries Science Center/NOAA
Clams, mussels, and oysters are popular seafood options
Telling them apart on market ice requires a closer look at their shells.
© Pam McLean—Photographer's Choice RF/Getty Images
diagram of rigid skeletons worked by muscles
Figure 4: Rigid skeletons worked by muscles.
Encyclopædia Britannica, Inc.