There's no difference between the arowana and the guppy, as they are different names for the same fish. Aohua fish belongs to the perch order perch family Siniperca genus fish, is China's "four famous freshwater fish" in one of the body, the body side flat, back bulging, thicker body, pointed head, scales are round and small, the body color for the brownish-yellow. The meat is tender, less spiny, flavorful, and is the best of the fish.