Hi Chugger,
The photos in both Linke & Staeck and Lamboj depict mature specimens. The coloration exhibited depends on how the camera catches the subject fish at the instant the photo is taken. Yes, in the hobby, Hemichromis sp. "Guinea I" is also known as H. sp. "Kolente/Kolente River."
Ted,
Yours is the first photo I've seen that does H. sp. "Guinea II" justice! I'm going to have to steal it. ;-)
Randall Kohn