Probably the most majestic fish within modern day fish keeping aquariums. Named the dragon fish by Chinese aquarists for good reason, its large coloured scales and beautiful movement make it seem like a shiny monster in the water.This fish has many different variations leading to huge differences is pricing. The Australian version of the Arowana is the Saratoga, both the Jardini and Leichardti are great additions, they uld the same characteristics as the Arowanaâs found overseas, its just they are legal within Australia.The silver Arowana is by far the most common and popular in the United States due to its cheap price and small starting size. You must not be fooled however, for it can grow up to 2 feet in length and easily break through aquarium glass if it becomes startled or angry.Other variations include the Green Arowana, which is slightly more expensive and then the RTG variety, which are imported from overseas with a microchip.RTG species are near extinction and so there prices have become astronomical, around $1000-5000 for a single fish. If you are not an experienced hobbyist then donât even bother. They are the same as any other type of arowana, it is just they are becoming so rare that the price and demand has gone through the roof.