I have 3 juvenile Pseudotropheus lombardoi. Right now if I am correct I have 2 males and 1 female as 1 is blue, 1 is most certainly yellow, and the other looks to be in the midst of changing from blue to yellow. I was of the understanding that most of the time they will chose different caves or territories, however, they all seem to have chosen the largest cave in the aquarium. They don't fight or seem to hassle each other yet. Are they all in the same due to being juveniles? Part of the problem may be the rather large Syndontis on the other end of the aquarium but him moving around doesn't seem to affect their actions.