Parachromis Dovii is armed with an impressive set teeth as well and quite relentless when attacking other fish. When they reach sexual maturity they can be down right serial killers and the males are often refered to as "Tank Busters." The odds of this co-hab are slim to none as both fish don't like company. Both are small in relation to thier eventual sizes, the Dovii will eat like a cow while the Rhom will probably stay parasitic for a little time longer and never be able to match the Dovii's growth rate - my Money's on the Dovii and if this cohab takes place, it will go down as one of the all time biggest blunders in cohabitation.