Looks like a ZZ Dragon bro. It's still really young and has a lot of coloring up to do, which it will happen pretty quick if good water parameters, feeding etc. I can't put a figure on the growth rate but if it eats well (but don't overfeed) it's going to start growing like a sprout soon.
Too early to tell for sure about the hump, but it's possible it's a female (that said I can't really tell from your pix if it has any black markings on its dorsal fin (which often indicates it's a female).
Depending on it's personality you might eventually have to get him/her their own tank, it might get increasingly aggressive with the other fish, just watch to see how they all get along but be prepared that you might have to move some fish. Good luck and show us some updates later as it grows out more.