Asian arowana scales are large (most over 2 cm in length) and have a delicate net pattern. Asian arowanas grow up to 90 cm (35 in) total length. [9] Like all Scleropages, Asian arowanas have long bodies; large, elongated pectoral fins, dorsal and anal fins located far back on the body; and a much larger caudal fin than that of their South American relative, the silver arowana , Osteoglossum bicirrhosum. The mouth is oblique with a very wide gape. The prominent lower jaw has two barbels at its ... If you are looking to have a single fish in your massive arowana tank, jardinii is probably your best choice. Indeed, although some specimens have been reported to successfully co-habitat with other large fish species, most individuals demonstrate no understanding for others whatsoever. Learn about the different types of Arowana fish , their unique features, and why they are so expensive and coveted. Find out how Arowanas are related to Asian culture and luck, and where they are native to. Also known as Dragon Fish , in this guide, you'll get a complete run down on the different types of arowana , how to set up a tank and care for them.