A clam is any of a number of edible[?] marine bivalve mollusks living in sand or mud[?] on the shores of oceans.
Also see mussel.
... to the United States Census Bureau, the town has a total area of 5.9 km² (2.3 mi²). 5.4 km² (2.1 mi²) of it is land and 0.6 km² ...