"Gill Passman" wrote in message
.. .
I came down this morning to find a dead Yellow Lab. I instantly thought it
was the tattered beaten up one that I've been trying to catch and isolate
for the past few days....but no...she is still swimming around and keeping
out of trouble. It was a perfectly healthy (until this morning) Lab. It was
pretty badly chewed up.

I have two suspects that are beating on one another so much that they now
both have sores on their mouths...and one of them bit me the other night.
Allegedly, they are Maylandia Lombardoi but from what I can see I'm now
suspecting they are "mutts" - I have 4 of them - 2 are slightly
bluish/white, one is very yellow and the other is a browny yellow. It is
the yellow and the browny yellow that are fighting - they are now 4-5 inch
plus and very fat. From the fry in the tank I'm a little confused about
their origin - deep blue with black vertical stripes - doesn't match
anything else I've got so I'm guessing they are from these fish.

Should I oik both of these fish out of the tank and trade them in as they
will certainly kill one another if not other tank companions? Should I
leave the status quo as if I get rid of these two Mbuna's by their nature
will then fight again and another dominant fish will emerge? Should I pick
one and keep it and get rid of the other one? "Innocent" fish are getting
caught up in their war...

Hey, i've had 2 yellow labs be "murdered" in my tank too. I originally came
to this NG to find out what happened to the first, but found out it was one
of my demasoni's picking on him. I bought a larger one to repalce him, but
the second one died, leaving just hte larger one. So far he's been ok.
He's about a 1/2" larger than the others. All the labs were larger than the
demasonis. THis week he killed yet another fish. I'm not sure what to do
about this agressive fish. In any case, the yellow labs are on the less
agressive side, and having a larger one seems to help.