Tom, your Krobia look very similar to the four adults I have. But the four youngsters that I got from Jeff Rapps are golden/yellow in color on the body. I've never seen other Krobia Xingu like them. They still have the black mask and the orange coloring on the face and gills, but the foreheads are a mustard yellow similar to Heterotilapia multispinosa. Did yours ever go through a yellowish phase as juvies? I think yours came from Rapps a few months before mine, right?