Arowanas are long, elongated fish belonging to the family Osteoglossidae. These fish have a narrow body that gives them an almost eel-like appearance. Arowanas are freshwater fish and are found in rivers, lakes, and ponds in Asia, South America, and Australia. They can also be found in flooded forests. This family of fish is closely related to the Arapaimidae family, another family of bony-tongued fishes which are also sometimes called Arowanas. In the family Osteoglossidae there are six species belonging to two genera:

• Silver Arowana (Osteoglossum bicirrhosum)  – native to South America
• Black Arowana (Osteoglossum ferreirai) – native to South America
• Southern Saratoga (Scleropages leichardti) – native to Australia
• Northern Saratoga (Scleropages jardinii) – native to Australia
• Asian Arowana (Scleropages formosus) – found across Asia
• Myanmar Arowana (Scleropages inscriptus) – native to Myanmar