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Clam
Exist in a Wide Range of Conditons
Wide range of tolerances to pollution; some are very sensitive
Mussels have a long life span
Two hinged shells enclose soft bodies
Clams are smaller (3/4 inches) and more round than mussels
Clams are usually symmetrical with the umbo (highest point on the shell) equally distant from both ends
Mussels have a flat, oblong shell shape
Soft, fleshy body (foot) may be seen extending from shell
No eyes or distinct head
