are the sea stars Asterias amurensis and Distolasterias nipon. The scallops are preyed on one after the other, and it was found that smaller scallops are preferred over larger ones. Scallops found in warmer waters are also more likely to be preyed upon. Due to the morphological differences between D. nipon and A. amurensis, D. nipon had a much greater influence on the predation of the Yesso scallops. Diet The scallops depend on sinking organic matter for food, with detritus being their main source of food. These organic matter are from rivers being drained nearby. Another source of food for the scallops are dissolved organic carbon from phytoplankton production. References Pectinidae Commercial molluscs Bivalves described in 1857