"This geographic pattern suggests that selection has shaped ... has given way to more permanent evolution—the thicker snails' shells became fixed genetic traits over generations.

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 ...

pattern shell. In the case of the larger cone snails, their harpoons can penetrate through gloves and wetsuits. “I decided to post it on Reddit to find out exactly which cone snail it is and how ...