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, which ...

You can see it in the logarithmic whorl of a nautilus. The milky iridescence of an abalone. The spiked turret of a queen conch. Precision, elegance, strength. The seashell is a consonance of form and ...

The new species of hermit crab-associated sea anemone, Paracalliactis tsukisome, secretes and constructs a unique shell-like structure known as a carcinoecium, which expands the host hermit crab’s ...