The parents dont look like this, the mother looks like the female in the picture but the males are reg blue trewavasae but they throw this color pattern.
I have 13 of these guys and 2 hoplo cats. I am going to be moving the cats soon to just have these guys in there. They are in a 37 gallon tank right now. I tried putting them in a larger tank and they didn't seem to be too happy and they weren't active at all. They love the 37.