Anthony and Cleopatra
Anthony and Cleopatra are lying dead on the floor of a villa in Egypt. Nearby is a broken bowl. There is no mark on either of their bodies and they were not poisoned. How did they die?
Anthony and Cleopatra were goldfish whose bowl was knocked over by a clumsy dog.
This is one of a set of puzzles which deceive by using human names for animals. This is not a very satisfactory basis for a good puzzle but despite that, the puzzle has enduring popularity.