As Flower Horn is from the South American Cichlid family, this fish is very territorial. Thus, they are very aggressive in nature. Co-existing with other fish is not advisable, especially smaller fish. Some parties have claimed that we can "play" with the Flower Horn. In actual fact, Flower Horn is actually trying to get rid of the "intruder" (be it a stick or a person's hand). Therefore, it is advisable that we keep our hands to ourselves as the fish has quite a nasty bite depending on the size of the fish. Flower Horn is not selective on food and their consumption is high. Worms, small shrimps and pellet fish food will do fine. What type of food or whether their stomach is fully filled are not a major issue, but the type of food which do not pollute the water should be taken into consideration. You can underfeed but not overfeed Flower Horn, thus it is advisable to feed them two to three times daily. Flower Horn may grow up to approximately12 inches in length depending on its breed and may live to 8 to 10 years. I have seen Flower Horns that were 16 inches long, breed by a skillful fish breeder.