Juveniles are eaten by flatworms (Platyhelminthes), leeches (Hirudidae), and crayfish as well as an array of freshwater fish including carp (Cyprinidae), sturgeon (Acipenseridae), catfish (Ictaluridae), and sunfish (Centrarchidae).    From Wordnik.com.  [Freshwater mussels in North America - factors affecting their endangerment and extinction] Reference