First off, beautiful fish! Dragons can be any color, it just means they have thick, dragon like, scales. And as for him being short finned, that is refered to as a Plakat (PK). Cannot say for sure if he is a half moon (HM) from that picture, getting him flaring would be the best way to tell. Also his head looks a bit spoon shaped in that photo, which is not a desirable trait.
Bettas - Giovanni (HM), Burly (HMPK Giant).