Take a few more pictures, top downs and close up of branch tips and radial corallites help immensely, even better if the polyp tentacles are retracted.
it's hard to say from this one pic and the smaller the coral is the harder for an accurate ID to be made. I have my doubts about it being hyacinthus, I'd start referencing species like A. anthocercis or A. cytherea.
Just my .02