Rizhao Clams

Rizhao Clams

　　Rizhao clams are considered a premium variety among shellfish and are renowned as the “King of Seafood.” In recent years, they have become one of the newly recognized “Four Famous Local Specialties” known both in China and abroad. The back edge of the clamshell is triangular, while the ventral edge is rounded, with both shells being equal in size. The shell surface is inflated, smooth, and covered with a layer of yellowish-brown, lacquer-like polish. Smaller individuals often display rich and varied shell patterns, which are highly diverse; larger individuals tend to have more consistent patterns. Rizhao clams typically inhabit the intertidal zones near river mouths and coastal areas, as well as sandy or gravelly seabeds in shallow waters. The clam meat is delicate and delicious, with a protein content of 13.19%. Aside from being eaten cooked, they can also be dried or canned. Rizhao clams also hold significant medicinal value. Ancient medicine believed that consuming them could treat skin ulcers, while modern research suggests that extracts from their soft tissue and digestive diverticula may inhibit cancer cells. They are also one of the important shellfish species contributing to export earnings. The coastal areas of Rizhao boast abundant clam resources, with nearly 20,000 mu of suitable intertidal flats for clam breeding and cultivation. Since 1993, the area dedicated to mixed ponds of prawns and clams has expanded year by year, currently reaching around 5,000 mu, with an annual production of nearly 1,000 tons of clams.