None, considering the tank has only been mixed for 24 hours. But when they spawned with oscars as tankmates, I watched my 3 inch female jck put 7 inch oscar in the corner. I removed the oscars to a new tank for the oscars safetyThats fine, so exactly how many Jack Demseys have you managed to raise out of your mixed tank???
BUT since how many fry can I expect in a mixed tank was NOT my original questions, is there anything that you would like to add that pertains to whether or not cross breeding can occur?