Probably most fish keepers gravitate over time to aquariums of Lake Malawi Cichlids. This is due to the incredible colors which rival those of reef dwelling fish. So this article discusses largely Lake Malawi cichlids.  Note that most of the photos in this article will drive the fish police absolutely bonkers. They have Lake Malawi, Lake Tanganyikan, Lake Victorian and even Central American cichlids like parrots and convicts all mixed together. There is nothing wrong with that. I have even put schools of tiger barbs in a Lake Malawi aquarium quite successfully.