Knobbed Whelk
Busycon carica
Found subtidally on sandy bottoms, this carnivorous snail is not a voracious eater; one large clam a month usually satisfies them.
First it uses muscular foot to steady and envelop a bivalve. It then forces open the two shells by using the edge of its own shell as a wedge. Finally, it inserts it proboscis and radula into the shell and ingests the clam.

Knobbed Whelk
Busycon carica
Found subtidally on sandy bottoms, this carnivorous snail is not a voracious eater; one large clam a month usually satisfies them.
First it uses muscular foot to steady and envelop a bivalve. It then forces open the two shells by using the edge of its own shell as a wedge. Finally, it inserts it proboscis and radula into the shell and ingests the clam.