He is not a dragon scale, just the normal blue or "royal blue". As for how to age the fish, chances are he is a young adult, no more than 8ish months old. Most bettas will be mature around 6 months. You can't see the "hunch back" that many older males will get. Plus his pelvic fins arem't too very long, maybe just as long or a bit shorter than his analfin. All of this points to a young mature adult. He could probably breed at this age too.