A green arowana has dull colours, almost like a silver arowana, but still an amazing fish, if you want a golden arowana, your best option is to sell it off and save up some money to buy a golden highback / X-back arowana (which are VERY expensive). If you don't have that sum of money then I suggest you keep the green arowana, they are amazing fishes with unique personalities, if you want to enhance the colours of the fish, try feeding it crickets, mealworms, or centipedes (preferably frozen, so it doesn't bite and kill your arowana >.<) occasionally. Only feed insects when your arowana is a juvenile or adult, so the hard shell doesn't block the digestive track of your fish. Hope This Helped