1. Clams are the common name for clams. Clams are small to medium-sized animal shells. The shell is thick and firm, rounded or nearly triangular in shape. The shell surface is glossy, with concentric whorls of veins, yellowish brown or tan, and the inner surface of the shell is white or greenish purple. The hinged part has three main teeth, the left shell has one anterior and one posterior lateral tooth, and the right shell has two anterior and two posterior lateral teeth, the upper end of the lateral teeth is serrated.

2, meat flavor, high nutritional value, can be eaten, but also fish, waterfowl natural feed. It is also a traditional Chinese medicine herb, which has the effects of promoting lactation, improving eyesight, facilitating urination and removing dampness and toxicity.

3, clams are slightly triangular in shape, slightly symmetrical on both sides. The shell surface is yellowish green, black-brown and black, glossy, the inner surface of the shell is mauve, bright purple and porcelain luster. It inhabits rivers and lakes. It is edible, and is also the bait for fish and birds, and can be used as farmland fertilizer.