So I have two separate tanks with South American pike charicins one tank has “smaller” hejutas and the other has larger marbles. So I do know that these fish can be inter mixed without issue since I’ve done it prior the only issue is the size I’ve heard that larger specimens may prey on smaller specimens however I’m not sure what the size ratio is to conclude if one would be attacked by the other. I’d like to introduce my hejutas to my marbles but I want to make sure the hejutas are big enough to be with the marbles. My marbles to my knowledge are completely non aggressive towards anything bigger than a large feeder gold fish but I also don’t keep anything that is particularly thin in their tank. They live with a sevrum, flag cichlid, feather fin squeakers, and a Lima non of which bother the marble pike charicins. So if anyone has also mixed South American pike charicins I’d like to know what size they should be before introducing them.