Maybe you've seen a "mermaid's purse" while walking on the beach. Not actually an accessory for the mythical creature, these small casings are the eggs of sharks and their relatives. For around 455 ...

Every summer, the quiet waters of Willapa Bay in Southwest Washington become a shark superhighway. By JES BURNS OPB Catching ...

This serene shot of an egg case of a swell shark (Cephaloscyllium ventriosum) tethered to the base of a giant kelp won in the Underwater category of the National History Museum’s Wildlife Photographer ...

Seven zebra shark eggs from Point Defiance Zoo & Aquarium are headed for the wild. Zebra sharks are considered an endangered species.