what fishes are good for ponds other than koi and goldfish?

Get in touch with your fish and game department to find out what kinds of fish and plants are not allowed . Then ask what kinds of native fish and plants are able to be used in your pond. They may put you in touch with their fishery biologist. some of the native fish can be very beautiful, also the fish and plants that you get if they get into the natural water ways should not cause any harm, whereas if you have exotic fish and plants and they get into the natural water ways can do a lot of harm.