.... I'm not an expert. I just happen to read a lot on it and combine it with the experience. I'm trying to understand the new color - dragons.... not much experience.
He looks dominantly black and green. If the female is of similar color, you should get similar colors and patterns. You might even get one or two black laces or at least the geno's. So if you want to eventually come up with black, you have to pick out the ones with most black. But it may take a few generations.
As for form, he is almost perfect. His anal is a bit long. So pick out the ones (esp. females) with a more symmetrical fin and continue your line. This may also take a few generations.
When continuing a line, I suggest to pick out your best female for form and male for color. At least that's what I've experienced thus far. .... This will not always be 100% true, but it's a tendency I rely on.