To be honest i dont think many JDs are over aggressive unless breeding . they are about character . I see its a Jewel in pic ? Them and Convicts are terrors for there size JD bit more laid back

If you pair {her?}up Alex is the sexing man . They gat more fire in there bellys

Yes, that is my lone jewel. I just ordered another one and I hope that then I will have a pair. The one I have coming is also full grown. Excited to see if I actually have a pair between the two. About the JD...it has its moments when it wants to chase some of the smaller fish but is a little too laid back for me. Perhaps when I get more room for more tanks, I can set up its own home and later find it a mate. I love the colors in it at this age.