The silver arowana (osteoglossum bicirrhosum) is the largest of of all the arowana species, capable of growing to 3 and a half feet in length- wowza!

While it is the biggest arowana, it’s also known to be one of the most docile as well.

Looks wise:

It has a distinct metallic silver color and elongated dorsal and anal fins, which only the arowanas from South America have. Lastly, it’s the most common and least expensive arowana you can find.

Pro Tip: A Silver Arowana (osteoglossum bicirrhosum) can easily reach 16”-20” in length within the first year.