Most articles about setting up a cichlid tank recommend creating "a lot of caves." But when I browse pictures of cichlid tanks, I see a lot of rockscapes that don't really meet the definition of "caves." For example, the tank below is beautiful, but it does'nt have a single "cave" as far as I can see. The aquarium gallery is full of pictures of cave-less tanks like this one. So, for mbuna, how important is it to have actual caves? Or, is it good enough just to have rocks without caves?