hi Lennard, nice new fish! love the pearls on his body.. Nice colours too..
They call it double marking when flowerhorn has 2 rows of marking on both top and middle.. its an aesthetics trait..
The kamfa Flowerhorns usually has a smaller kok compared to SRD (Cencu based), but well, flowerhorn has been crossbred many times to produce the best looking fish (Big kok, Great pearls, colours, markings).
From the look of it, i think he has good potential. You can always give him kok growth pellets from Okiko, and Ocean Free to grow his kok..