I have owned a some land that I had a few ponds dug on it and yes I fished them after they was established. I bought most of the fish as fingerlings and got food for them and fed them growing after a 3 years I had some awesome blue gills bigger then your hand and catfish was a few pounds and bass was small but decent sized too. I met a guy that has a good sized pond like 3 acres that he keeps different types of cichlids and breeds them I ain't sure about what species he has but he claims to have good success at it