The largest river mussel in the world is the crested clam. The world refers to the entire universe or environment in which we live, and the largest river mussel in the world is the Chinese crested clam. Individuals of this type of river mussel can grow up to 40 centimeters. It is the largest river mussel species in the world and is distributed in Heilongjiang and Liaoning. , Shanxi, Shaanxi and Gansu, etc., they like to live in freshwater lakes, rivers and reservoirs with slow flowing water, and are attached to rocks or pool bottoms with wide ligaments. Due to their huge size and rich meat, the wrinkled crested clam is often used as Edibles and decorations. The ruffled crested clam is a large freshwater shellfish. Its adult body is much larger than that of the triangular clam. It inhabits the mud or sandy bottom of the lake, as well as still water or places with slow currents. The water quality requires a pH value of 4.5 to 9.5. Within the range, they gather in groups at a depth of 1 to 3 meters. When the weather is cold in winter and spring, they bury their entire bodies in the sandy bottom, with only the rear edge of the shell exposed, and open the rear edge of the shell for breathing and feeding.