Here's a group of juvie chilumba's. #2 is obviously a male. #1 and #3 are also males. Typically males will shift into sub-dominant colors when in proximity with the alpha male. Those males will appear identical as #2 when far from him or when attempting to challenge him. #4 and #6 are females, they seem to have a more brownish tint. #5 is unknown, possibly a male. The un-numbered one at the far left is a pseudotropheus demasoni. :)