Hi badflash. Thanks for directing me to this forum. I would be interested in the "black tilapia" that you mentioned in another forum. If I quess right, it would be O.hornorum X O.mossambicus. A few years ago, there was an outfit here producing such a hybrid but the quality deteriorated after some time. Apparently, the genetic integrity of the breeders was not properly maintained. It's a pity because the hybrids were initially all male and needed no hormones for sex reversal and they were highly tolerant to saline environment. Thanks again.