Corbicula fluminea (Golden Freshwater Clam) is a species of mussels in the family Cyrenidae. They are associated with freshwater habitat. Individuals can grow to 65 mm.
Definition: A habitat that is in or on a body of water containing low concentrations of dissolved salts and other total dissolved solids (<0.5 grams dissolved salts per litre).
Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)