A flowerhorn is an intentionally bred hybrid. Originally thought to be a cross between a Trimac and possibly a Midas/RD, but definitely very strong Trimac genes...today they're so selectively bred that they're on the verge of being a species in themselves. They're extremely popular in the orient, where a lot of the higher-quality FH's come from (I personally had two shipped over from Thailand). You can find low-grade flowerhorns in shops sometimes, but high quality fish are very expensive. Adult fish, especially males, often sell at prices from $300-$1000.