Oyster Shells Help to Rebuild Shorelines July 14, 2021 In this June 29, 2021 photo, workers on a large flat boat (called a barge) put 680 bushels of clam and oyster shells into the Mullica River in Port Republic, New Jersey. (AP Photo/Wayne Parry) Share share The URL has been copied to your clipboard 0:00 0:06:04 0:00 Pop-out player When we eat some popular kinds of shellfish, namely clams, mussels and oysters, we leave behind large amounts of shells. Instead of throwing these shells into the trash, several projects around the United States now aim to put these shells back into waterways. The goal is to restore, or bring back, the natural environment -- a process called