SARASOTA — Stuffed in drawers and gleaming on glass shelves, Tom Castle flashes a twinkle in his eye when he sees and talks about his seashell collection. It’s a “collector’s itch,” as he calls it, ...

For Priscilla Ellison of Blacksburg, going to Virginia Beach and walking along the sand to find seashells is child's play. Try going to the Red Sea in Saudi Arabia, where one has to brave barracudas, ...