What do you call a fish who wears a crown?

This little riddle is a classic example of wordplay, specifically a pun, which relies on a word or phrase having two different meanings or sounding similar to another word. The humor here comes from the clever twist on the word "kingfish." We associate a crown with royalty, a "king" in particular, so when you imagine a fish wearing that majestic headgear, your mind naturally leaps to the idea of a royal fish.

The punchline then playfully reveals the double meaning. "King-fish" sounds just like "king fish," but it also happens to be the real name for several species of fish found in oceans around the world. So, the joke not only makes a silly connection between a crown and a fish but also cleverly uses a genuine term from the animal kingdom, giving it an extra layer of unexpected accuracy. It’s a simple, snappy bit of fun that plays on our expectations and a familiar name.