Simulated seafood products are moist, and have a fresh appearance without traces of browning or discoloration. Clams, Oysters and Mussels Purchase raw shellfish carefully. Buy raw clams, oysters and mussels only from reputable markets. Clams, oysters and mussels in the shell are alive, and the shells close tightly when tapped. Gaping shells indicate that the shellfish are dead and not edible.
Shucked oysters are plump, and have a mild odor, a natural creamy color, and clear liquid or nectar.
Scallops Fresh scallops have a sweetish odor and are free of excess liquid when packaged. The meat of the large sea scallop is white, orange or pink. Smaller bay and calico scallops are white, light tan, or pinkish. Contamination with illness causing bacteria can make cooked seafood unsafe. Live and raw seafood may naturally carry illness causing bacteria.