flowerhorns are not a specie, they are a hybrid of various cichlid species. they originally were bred in southern asia, but are now bred in many other parts of the world as well
Load of rubbish normally trimac x synspilus or synspilus x labiatus or whatever. pretty fish but no good to the serious cichlid hobbyist (when Synspilum, Paratilapia, Umbriferus etc are available why have these..??) and tehy are killing the genetic pool . Rant over..
Having said that, they do look amazing.