All mollusks build their own shells ... snails, clams, oysters and mussels use an organ called a mantle to secrete layers of calcium carbonate, which crystallize and harden. Mollusks have a ...

What's inside a clam? A retractable foot ... At first, we didn't have much luck. Benji: I got one, but it looks like it's dead. Soren Dahl: Old shell. Benji: Oh, I got a crab.

Volunteers in Clinton spent Wednesday morning gluing seeds to clam shells. It is not some kind of arts and crafts project.