DOWN THE HATCH

摘要

Welcome to the preys-eye view of the three-spined stickleback, Mark Purnelt, a research fellow at the University of Leicester in England, stained the fish to highlight the skeleton and examined surface textures on the teeth. Each tooth is about the width of a human hair, and its texture indicates what the fish ate. Sticklebacks that feed on worms lurking in the sand have scratched teeth; those that eat plankton floating near the top of the lake have smooth teeth.