Flowerhorn cichlids are ornamental aquarium fish noted for their vivid colors and the distinctively shaped heads for which they are named. Their head protuberance, or kok, is formally termed a "nuchal hump." Like blood parrot cichlids, they are man-made hybrids that do not exist in nature. First developed in Malaysia, Thailand, and Taiwan, they are now kept by fish hobbyists worldwide.
Another poor victim of cross breeding for cosmetic and financial gain, the hybrid Flowerhorn cichlid originated from crossing the Trimac cichlid with a whole host of other Central American cichlid species and seeing what came out. About a decade on those humps are getting seriously large – too large – and short bodied fish are also being favoured (which are missing vertebrae), but the unluckiest of all get their tails chopped off with no anaesthetic!