Aristotle's lantern

Aristotle's lantern is the unique jaw structure found in sea urchins, named after Aristotle because he first described it. It consists of a complex system of calcareous plates and muscles that work together like a feeding apparatus. This structure allows the urchin to pry open and scrape algae or other food from surfaces. The lantern can extend outward and move in various directions, giving the sea urchin precise control over its feeding process. It is a highly specialized adaptation that enables these creatures to efficiently consume their preferred diets in their underwater environments.