Invertebrate animal (mollusk) with two-valved shells hinged on one side, a small head, and a compressed body
Varies by species; some burrow in sand, mud, or rocks.
Filter detritus, algae, protozoans, small crustaceans, insect larvae from the water
Snails, sea stars, certain fish, diving ducks, emperor geese, shorebirds, sea otters, humans
Clams can burrow very rapidly by extending their "foot" into the sand or mud, expanding the tip to act as an anchor, and pulling themselves down.
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