What do medium sized fish eat?

It's impossible to give a definitive answer to what medium-sized fish eat because "medium-sized" is a very broad category. Fish size varies dramatically, and what one species considers medium-sized, another might consider small or large.

To give you a better idea of what medium-sized fish eat, I need more information! Tell me:

* What kind of fish are you interested in? (e.g., perch, trout, catfish, etc.)

* What is their habitat? (e.g., freshwater lake, saltwater ocean, coral reef, etc.)

Once I have that information, I can provide a much more specific and helpful answer!