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They are 2 shelled mollusks. Some Clams (depending on the species) live in fresh water. Others are marine. And a few can live in either fresh or salt water. Almost all oysters are marine and almost all mussels are freshwater. Other than where they live they have similar lifestyles.

2007-02-01 09:21:43 · answer #1 · answered by lightening rod 5 · 0 0

These are just different species of bivalve mollusks.

2007-01-30 02:22:19 · answer #2 · answered by ecolink 7 · 0 0

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