Below is a young male Paralabidochromis sp "rock kribensis":

A female rock krib above

Dominant male Rock Krib below left                                   and sub-dominant male below right:

Female rock kribs below:

As you can see, in this color variant, the female is pure yellow/black with no red at all.  This is one of the few Victorians in which the female is NOT a bland silver or grey fish.  I believe that this cichlid was previously described as species #22.  According to Ole Seehausen's book it looks like it comes from around Python Island or Mwanza Gulf on the shore of Tanzania in southern Lake Victoria.  This variety of rock kribensis is fairly common in the hobby.  It is much different looking from the very rare blue colored rock kribs I have from the shores of Uganda.  I have two males and six females in my 180 gallon tank.

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Female (yellow/grey) rock kribensis on below left.            Male (yellow/grey) rock kribensis on below right

I bought the above two victorian cichlids at the Cincinnati club auction in the fall of 2002.  Notice that this female has a touch of red on the fins and the male has more red on the fins with the red "belly".  I'm a little worried that these are not a pure strain.  Note the difference in the shape of the head.  These two passed away quite a few years ago.

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see also:

http://www.hillcountrycichlidclub.com/articles/Paralabidochromis%20sp%20rock%20krib.pdf

http://www.aquahobby.com/gallery/ghaplokrib.html