Strangely, I've noted what may be the same type black spot on a female yellow lab in my 75 gal tank. She's fairly small, but has spawned 4 times since I got her late Aug 07. The spot does not appear raised. It has grown, but is still fairly small--maybe 1/8" dia. She seems to behave normally, but I am concerned as the spot is growing. She may be stressed, as she is often chased by virtually every other cichlid in the tank--other than small fry, and frequently tries to hide, even when not holding. Based on your comments, I may move her to a "hospital" tank for a little vacation. Temp 80 deg F, PH 8, 25% water change weekly. thanks,[/img]