Like oysters and mussels, clams are bivalves, a kind of mollusk that's encased in a shell made of two valves, or hinging parts. And that shell comes in all different sizes. There are small clams ...

However, the snail speeds up the process a bit by producing hydrochloric acid and enzymes to help dissolve the clam's shell and liquefy ... in what is called a 'sand collar' (pictured)," the ...