Micropterus dolomieu is the latin name for smallmouth bass.

A black bass is any fish of the genus Micropterus, such as the smallmouth bass or the largemouth bass.

Both large and smallmouth bass will eat clams. Usually the will eat the when the clams are "on the move". The clams will expose themselves when they move and bass will bite off the exposed clam. The smallmouth bass is the only freshwater bass with an upper jaw plate designed for cracking the shell of the clam. We have studied bass since 1976 and have recorded clam in stomachs and fecies of both large and smallmouth bass quite regualarly.

Bass in the genus Micropterus, the largemouth, smallmouth, spotted, and Coosa bass all love crayfish.

A big largemouth would eat a smaller fish of any species.