Corbicula fluminea

Corbicula fluminea is a species of freshwater clam, an aquatic bivalve mollusk in the family Cyrenidae. This species is often confused with Corbicula fluminalis due to the two species' similar colour and texture. The species is regarded as having originated somewhere in Eastern Asia, leading to the common names of Asian clam or Asiatic clam. In the aquarium and koi pond trade, it is often called golden clam or golden freshwater clam. In Southeast Asia, it is known as the prosperity clam or good luck clam. In Korean, the name is 재첩 (jaecheop, among other transliterations), and the species is used for a common dish called jaecheop-guk (clam soup). The species has been introduced into many parts of the world, including South America, North America and Europe.