Shell: Science Fiction

The shell gave easily beneath her prying fingers. It was too easy, she stopped for a second, hesitating. Everybody knew that opening the previous shells was difficult. She'd never heard anybody say anything about anyone ever having it easy. Maybe it was like oysters, she thought. Maybe if they died, their shells just opened up on their own. Maybe that was why nobody had ever found it. Maybe she was the first one to find a dead one. If that was true--she shivered with delight at the idea of the sort of reward she'd get for that. Dead of natural causes? The scientists would be shitting themselves over that one. They'd spent so much time trying to figure out how to kill the damn things, without one drop of luck, that they'd be relieved to know that the critters could even *die*.

Inspiration: Clamshell I found in the Mississippi River
Story Potential: Low. Just a minute, not an actual story.
Notes: Could add good background detail to an alien invasion story, though.