But not so fast! Although the animals that belong to the emperor aren’t similar to one another with respect to their morphology (形態學) – i.e., their form or structure – they are similar to one another with respect to their owner. And while the hammerhead sharks (雙髻鯊) are similar to one another with respect to their morphology, they aren’t similar to one another when it comes to ownership – or, indeed, when it comes to any number of properties they might have: their location, or their favorite kind of fish to eat, and so on. Q: What makes classifying animals by morphology more “natural” than classifying them by ownership?