Flowerhorns are a cross between a synspilum and a trimaculatum. They are bred in bangkok. They even have fish market where they get high prices for their flowerhorns. It's called flowerhorn row.
As far as I've known, not on Syns, Trimac, but Red Devil also. My understanding was that you have to have 3 sets of genes, Not to mention I've never seen just a 2 gene hybrid come out that well. Grant it only a handful of a whole batch look that good but....
I think the most expensive flowerhorn for sale that I remember was 15g's of cold cash.....don't remember where or if that's right, but yo, think about how many homies fell for that kinda roll.....