All mollusks build their own shells, whether they live in water or on land. Creatures like snails, clams, oysters and mussels use an organ called a mantle to secrete layers of calcium carbonate ...

Mollusks are the second largest animal phylum ... and their density was so similar to the surrounding rock that even CT scans wouldn’t have offered a clear picture of the animals.

The study logs fish deliberately picking up hard-shelled prey like crabs and mollusks, smashing them against hard surfaces like rocks to access the meal inside. "Tool use is typically associated ...

With names like “knobby rams-horn,” “masked duskysnail” and “Hoko vertigo,” Pacific Northwest mollusks may have an amusing image, but they’re also some of the most intriguing invertebrates in the ...