Same as derringer had already mentioned. It's possible that some of the assorted cichlids are not in fact hybrids. although a larger proportion of them probably is. Sometimes it's obvious and other times the hybridization occurred a few generations back so it retains the looks of one specie over another, although it might take on the personality of another.
It looks like a demasoni. If it grows any bigger it could be a maylandia zebra?? but with hybrids it could be both. who knows. Just know that it is mbuna and mbuna tend to be territorial. They tend to do better with other mbunas, but make sure you check on the compatibility of the mixes that you do.
