What fish eats goldfish?

Any fish that eat other fish would eat a gold fish. Yet since a gold fish is a house pet err fish it would die at the shock of being put in other waters. A baby gold fish may be eaten by other domestic fish also.

A good rule of thumb is that if a fish's mouth is big enough to eat another fish it would be unwise to put them together. Specifically relating to goldfish, though, remember that they are often used as feeders.