What's inside a clam? A retractable foot, a siphon for sucking up water, powerful muscles, and, sometimes, a pearl. And you thought oysters were fancy.

Not all bivalves are created equal. Oysters and clams are both bivalves—animals with two connected shells—but they have more differences than similarities. While the differences may not be obvious at ...

Octopus filmed firing stones from her siphon from inside a clam shell like a sniper in never-before-seen behavior captured for the Netflix series Our Oceans. When you purchase through links on our ...