White jade shells, luminous shells, pearl shells, heptagonal shells, cargo shells, oysters, fragrant snails, red shells, salamander shells, snails, scallops, clams, oysters, razor clams, mussels and so on. It refers to the shellfish that can be eaten by human beings and has a delicious flavor. There are many different types and various looks.

The mollusk is a member of the phylum Mollusca, and is known as a bivalve. Because of the general body with 1~2 pieces of shells, so the name. There are about 11,000 extant species.

Scallops belong to the genus of marine bivalve mollusks, the shell is fan-shaped, but the butterfly hinge line is straight, the butterfly hinge of the two ends of the wing-like protrusion, the shell is smooth or have radial ribs. The ribs are smooth, scaly or verrucose, and are bright red, purple, orange, yellow to white in color. The lower shell is lighter in color and smoother.

The scented conch belongs to the mollusc gastropod group. Conch shell edge outline slightly quadrangular, large and thick shell up to about 10 centimeters, the conch layer of 6 levels, within the red apricot, pearl luster. The conch meat is rich and delicate, delicious flavor, known as the "Pearl of the dish" reputation.

The mussel has a dark brown shell, living on the rocks of the coast, two shelled mollusks, distributed along the coasts of China's Yellow Sea and Bohai Sea, the shell is wedge-shaped, the front is conical, the back is broadly rounded.